NORTHWESTERN CORPORATION has sponsored the creation of one or more 401k plans.
Submission information for form 5500 for 401k plan NORTHWESTERN ENERGY FLEXIBLE COMPENSATION PLAN
401k plan membership statisitcs for NORTHWESTERN ENERGY FLEXIBLE COMPENSATION PLAN
| Measure | Date | Value |
|---|
| 2022 : NORTHWESTERN ENERGY FLEXIBLE COMPENSATION PLAN 2022 401k financial data |
|---|
| Total unrealized appreciation/depreciation of assets | 2022-12-31 | $0 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-12-31 | $3,687,882 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-12-31 | $3,607,892 |
| Total income from all sources (including contributions) | 2022-12-31 | $27,545,298 |
| Total loss/gain on sale of assets | 2022-12-31 | $0 |
| Total of all expenses incurred | 2022-12-31 | $32,809,262 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2022-12-31 | $31,788,067 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2022-12-31 | $31,602,781 |
| Value of total assets at end of year | 2022-12-31 | $21,546,920 |
| Value of total assets at beginning of year | 2022-12-31 | $26,730,894 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2022-12-31 | $1,021,195 |
| Total interest from all sources | 2022-12-31 | $0 |
| Total dividends received (eg from common stock, registered investment company shares) | 2022-12-31 | $21,323 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2022-12-31 | No |
| Total dividends received from registered investment company shares (eg mutual funds) | 2022-12-31 | $21,323 |
| Administrative expenses professional fees incurred | 2022-12-31 | $990,903 |
| Was this plan covered by a fidelity bond | 2022-12-31 | Yes |
| Value of fidelity bond cover | 2022-12-31 | $10,000,000 |
| Were there any nonexempt tranactions with any party-in-interest | 2022-12-31 | No |
| Contributions received from participants | 2022-12-31 | $6,187,976 |
| Participant contributions at end of year | 2022-12-31 | $51,083 |
| Participant contributions at beginning of year | 2022-12-31 | $23,905 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2022-12-31 | $1,441,281 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2022-12-31 | $1,417,965 |
| Liabilities. Value of operating payables at end of year | 2022-12-31 | $157,129 |
| Liabilities. Value of operating payables at beginning of year | 2022-12-31 | $146,966 |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2022-12-31 | No |
| Value of net income/loss | 2022-12-31 | $-5,263,964 |
| Value of net assets at end of year (total assets less liabilities) | 2022-12-31 | $17,859,038 |
| Value of net assets at beginning of year (total assets less liabilities) | 2022-12-31 | $23,123,002 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2022-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2022-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2022-12-31 | No |
| Investment advisory and management fees | 2022-12-31 | $30,292 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2022-12-31 | $7,814,037 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2022-12-31 | $9,342,286 |
| Value of interest in common/collective trusts at end of year | 2022-12-31 | $12,240,519 |
| Value of interest in common/collective trusts at beginning of year | 2022-12-31 | $15,946,738 |
| Expenses. Payments to insurance carriers foe the provision of benefits | 2022-12-31 | $2,422,142 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2022-12-31 | $-1,399,572 |
| Net investment gain or loss from common/collective trusts | 2022-12-31 | $-2,679,234 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2022-12-31 | Yes |
| Was there a failure to transmit to the plan any participant contributions | 2022-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2022-12-31 | No |
| Contributions received in cash from employer | 2022-12-31 | $25,414,805 |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2022-12-31 | $29,365,925 |
| Liabilities. Value of benefit claims payable at end of year | 2022-12-31 | $3,530,753 |
| Liabilities. Value of benefit claims payable at beginning of year | 2022-12-31 | $3,460,926 |
| Did the plan have assets held for investment | 2022-12-31 | Yes |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2022-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2022-12-31 | No |
| Opinion of an independent qualified public accountant for this plan | 2022-12-31 | Unqualified |
| Accountancy firm name | 2022-12-31 | EIDE BAILLY LLP |
| Accountancy firm EIN | 2022-12-31 | 450250958 |
| 2021 : NORTHWESTERN ENERGY FLEXIBLE COMPENSATION PLAN 2021 401k financial data |
|---|
| Total unrealized appreciation/depreciation of assets | 2021-12-31 | $0 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2021-12-31 | $3,607,892 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2021-12-31 | $3,535,657 |
| Total income from all sources (including contributions) | 2021-12-31 | $35,731,714 |
| Total loss/gain on sale of assets | 2021-12-31 | $0 |
| Total of all expenses incurred | 2021-12-31 | $32,966,465 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2021-12-31 | $31,925,691 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2021-12-31 | $32,285,283 |
| Value of total assets at end of year | 2021-12-31 | $26,730,894 |
| Value of total assets at beginning of year | 2021-12-31 | $23,893,410 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2021-12-31 | $1,040,774 |
| Total interest from all sources | 2021-12-31 | $0 |
| Total dividends received (eg from common stock, registered investment company shares) | 2021-12-31 | $59,544 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2021-12-31 | No |
| Total dividends received from registered investment company shares (eg mutual funds) | 2021-12-31 | $59,544 |
| Administrative expenses professional fees incurred | 2021-12-31 | $962,499 |
| Was this plan covered by a fidelity bond | 2021-12-31 | Yes |
| Value of fidelity bond cover | 2021-12-31 | $10,000,000 |
| Were there any nonexempt tranactions with any party-in-interest | 2021-12-31 | No |
| Contributions received from participants | 2021-12-31 | $5,863,550 |
| Participant contributions at end of year | 2021-12-31 | $23,905 |
| Participant contributions at beginning of year | 2021-12-31 | $24,023 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2021-12-31 | $1,417,965 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2021-12-31 | $774,172 |
| Liabilities. Value of operating payables at end of year | 2021-12-31 | $146,966 |
| Liabilities. Value of operating payables at beginning of year | 2021-12-31 | $145,987 |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2021-12-31 | No |
| Value of net income/loss | 2021-12-31 | $2,765,249 |
| Value of net assets at end of year (total assets less liabilities) | 2021-12-31 | $23,123,002 |
| Value of net assets at beginning of year (total assets less liabilities) | 2021-12-31 | $20,357,753 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2021-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2021-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2021-12-31 | No |
| Investment advisory and management fees | 2021-12-31 | $78,275 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2021-12-31 | $9,342,286 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2021-12-31 | $8,661,011 |
| Value of interest in common/collective trusts at end of year | 2021-12-31 | $15,946,738 |
| Value of interest in common/collective trusts at beginning of year | 2021-12-31 | $14,434,204 |
| Expenses. Payments to insurance carriers foe the provision of benefits | 2021-12-31 | $2,390,799 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2021-12-31 | $390,886 |
| Net investment gain or loss from common/collective trusts | 2021-12-31 | $2,996,001 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2021-12-31 | Yes |
| Was there a failure to transmit to the plan any participant contributions | 2021-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2021-12-31 | No |
| Contributions received in cash from employer | 2021-12-31 | $26,421,733 |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2021-12-31 | $29,534,892 |
| Liabilities. Value of benefit claims payable at end of year | 2021-12-31 | $3,460,926 |
| Liabilities. Value of benefit claims payable at beginning of year | 2021-12-31 | $3,389,670 |
| Did the plan have assets held for investment | 2021-12-31 | Yes |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2021-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2021-12-31 | No |
| Opinion of an independent qualified public accountant for this plan | 2021-12-31 | Unqualified |
| Accountancy firm name | 2021-12-31 | EIDE BAILLY LLP |
| Accountancy firm EIN | 2021-12-31 | 450250958 |
| 2020 : NORTHWESTERN ENERGY FLEXIBLE COMPENSATION PLAN 2020 401k financial data |
|---|
| Total unrealized appreciation/depreciation of assets | 2020-12-31 | $0 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2020-12-31 | $3,535,657 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2020-12-31 | $3,414,248 |
| Total income from all sources (including contributions) | 2020-12-31 | $32,098,324 |
| Total loss/gain on sale of assets | 2020-12-31 | $0 |
| Total of all expenses incurred | 2020-12-31 | $30,520,696 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2020-12-31 | $29,390,662 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2020-12-31 | $29,261,338 |
| Value of total assets at end of year | 2020-12-31 | $23,893,410 |
| Value of total assets at beginning of year | 2020-12-31 | $22,194,373 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2020-12-31 | $1,130,034 |
| Total interest from all sources | 2020-12-31 | $0 |
| Total dividends received (eg from common stock, registered investment company shares) | 2020-12-31 | $33,798 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2020-12-31 | No |
| Total dividends received from registered investment company shares (eg mutual funds) | 2020-12-31 | $33,798 |
| Administrative expenses professional fees incurred | 2020-12-31 | $1,020,662 |
| Was this plan covered by a fidelity bond | 2020-12-31 | Yes |
| Value of fidelity bond cover | 2020-12-31 | $10,000,000 |
| Were there any nonexempt tranactions with any party-in-interest | 2020-12-31 | No |
| Contributions received from participants | 2020-12-31 | $5,694,463 |
| Participant contributions at end of year | 2020-12-31 | $24,023 |
| Participant contributions at beginning of year | 2020-12-31 | $21,305 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2020-12-31 | $774,172 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2020-12-31 | $694,285 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2020-12-31 | $0 |
| Liabilities. Value of operating payables at end of year | 2020-12-31 | $145,987 |
| Liabilities. Value of operating payables at beginning of year | 2020-12-31 | $93,526 |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2020-12-31 | No |
| Value of net income/loss | 2020-12-31 | $1,577,628 |
| Value of net assets at end of year (total assets less liabilities) | 2020-12-31 | $20,357,753 |
| Value of net assets at beginning of year (total assets less liabilities) | 2020-12-31 | $18,780,125 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2020-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2020-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2020-12-31 | No |
| Investment advisory and management fees | 2020-12-31 | $109,372 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2020-12-31 | $8,661,011 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2020-12-31 | $8,710,483 |
| Value of interest in common/collective trusts at end of year | 2020-12-31 | $14,434,204 |
| Value of interest in common/collective trusts at beginning of year | 2020-12-31 | $12,768,300 |
| Expenses. Payments to insurance carriers foe the provision of benefits | 2020-12-31 | $2,845,827 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2020-12-31 | $816,730 |
| Net investment gain or loss from common/collective trusts | 2020-12-31 | $1,986,458 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2020-12-31 | Yes |
| Was there a failure to transmit to the plan any participant contributions | 2020-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2020-12-31 | No |
| Contributions received in cash from employer | 2020-12-31 | $23,566,875 |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2020-12-31 | $26,544,835 |
| Liabilities. Value of benefit claims payable at end of year | 2020-12-31 | $3,389,670 |
| Liabilities. Value of benefit claims payable at beginning of year | 2020-12-31 | $3,320,722 |
| Did the plan have assets held for investment | 2020-12-31 | Yes |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2020-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2020-12-31 | No |
| Opinion of an independent qualified public accountant for this plan | 2020-12-31 | Disclaimer |
| Accountancy firm name | 2020-12-31 | EIDE BAILLY LLP |
| Accountancy firm EIN | 2020-12-31 | 450250958 |
| 2019 : NORTHWESTERN ENERGY FLEXIBLE COMPENSATION PLAN 2019 401k financial data |
|---|
| Total unrealized appreciation/depreciation of assets | 2019-12-31 | $0 |
| Total unrealized appreciation/depreciation of assets | 2019-12-31 | $0 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2019-12-31 | $3,414,248 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2019-12-31 | $3,414,248 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2019-12-31 | $3,889,882 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2019-12-31 | $3,889,882 |
| Total income from all sources (including contributions) | 2019-12-31 | $33,966,999 |
| Total income from all sources (including contributions) | 2019-12-31 | $33,966,999 |
| Total loss/gain on sale of assets | 2019-12-31 | $0 |
| Total loss/gain on sale of assets | 2019-12-31 | $0 |
| Total of all expenses incurred | 2019-12-31 | $31,020,979 |
| Total of all expenses incurred | 2019-12-31 | $31,020,979 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2019-12-31 | $29,927,936 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2019-12-31 | $29,927,936 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2019-12-31 | $30,066,638 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2019-12-31 | $30,066,638 |
| Value of total assets at end of year | 2019-12-31 | $22,194,373 |
| Value of total assets at end of year | 2019-12-31 | $22,194,373 |
| Value of total assets at beginning of year | 2019-12-31 | $19,723,987 |
| Value of total assets at beginning of year | 2019-12-31 | $19,723,987 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2019-12-31 | $1,093,043 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2019-12-31 | $1,093,043 |
| Total interest from all sources | 2019-12-31 | $0 |
| Total interest from all sources | 2019-12-31 | $0 |
| Total dividends received (eg from common stock, registered investment company shares) | 2019-12-31 | $42,909 |
| Total dividends received (eg from common stock, registered investment company shares) | 2019-12-31 | $42,909 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2019-12-31 | No |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2019-12-31 | No |
| Total dividends received from registered investment company shares (eg mutual funds) | 2019-12-31 | $42,909 |
| Total dividends received from registered investment company shares (eg mutual funds) | 2019-12-31 | $42,909 |
| Administrative expenses professional fees incurred | 2019-12-31 | $996,094 |
| Administrative expenses professional fees incurred | 2019-12-31 | $996,094 |
| Was this plan covered by a fidelity bond | 2019-12-31 | Yes |
| Was this plan covered by a fidelity bond | 2019-12-31 | Yes |
| Value of fidelity bond cover | 2019-12-31 | $10,000,000 |
| Value of fidelity bond cover | 2019-12-31 | $10,000,000 |
| Were there any nonexempt tranactions with any party-in-interest | 2019-12-31 | No |
| Were there any nonexempt tranactions with any party-in-interest | 2019-12-31 | No |
| Contributions received from participants | 2019-12-31 | $5,489,882 |
| Contributions received from participants | 2019-12-31 | $5,489,882 |
| Participant contributions at end of year | 2019-12-31 | $21,305 |
| Participant contributions at end of year | 2019-12-31 | $21,305 |
| Participant contributions at beginning of year | 2019-12-31 | $14,596 |
| Participant contributions at beginning of year | 2019-12-31 | $14,596 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2019-12-31 | $694,285 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2019-12-31 | $694,285 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2019-12-31 | $1,038,452 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2019-12-31 | $1,038,452 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2019-12-31 | $0 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2019-12-31 | $0 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2019-12-31 | $150,811 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2019-12-31 | $150,811 |
| Liabilities. Value of operating payables at end of year | 2019-12-31 | $93,526 |
| Liabilities. Value of operating payables at end of year | 2019-12-31 | $93,526 |
| Liabilities. Value of operating payables at beginning of year | 2019-12-31 | $91,719 |
| Liabilities. Value of operating payables at beginning of year | 2019-12-31 | $91,719 |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2019-12-31 | No |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2019-12-31 | No |
| Value of net income/loss | 2019-12-31 | $2,946,020 |
| Value of net income/loss | 2019-12-31 | $2,946,020 |
| Value of net assets at end of year (total assets less liabilities) | 2019-12-31 | $18,780,125 |
| Value of net assets at end of year (total assets less liabilities) | 2019-12-31 | $18,780,125 |
| Value of net assets at beginning of year (total assets less liabilities) | 2019-12-31 | $15,834,105 |
| Value of net assets at beginning of year (total assets less liabilities) | 2019-12-31 | $15,834,105 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2019-12-31 | No |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2019-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2019-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2019-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2019-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2019-12-31 | No |
| Investment advisory and management fees | 2019-12-31 | $96,949 |
| Investment advisory and management fees | 2019-12-31 | $96,949 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2019-12-31 | $8,710,483 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2019-12-31 | $8,710,483 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2019-12-31 | $8,263,203 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2019-12-31 | $8,263,203 |
| Value of interest in common/collective trusts at end of year | 2019-12-31 | $12,768,300 |
| Value of interest in common/collective trusts at end of year | 2019-12-31 | $12,768,300 |
| Value of interest in common/collective trusts at beginning of year | 2019-12-31 | $10,407,736 |
| Value of interest in common/collective trusts at beginning of year | 2019-12-31 | $10,407,736 |
| Expenses. Payments to insurance carriers foe the provision of benefits | 2019-12-31 | $2,502,398 |
| Expenses. Payments to insurance carriers foe the provision of benefits | 2019-12-31 | $2,502,398 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2019-12-31 | $1,204,371 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2019-12-31 | $1,204,371 |
| Net investment gain or loss from common/collective trusts | 2019-12-31 | $2,653,081 |
| Net investment gain or loss from common/collective trusts | 2019-12-31 | $2,653,081 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2019-12-31 | Yes |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2019-12-31 | Yes |
| Was there a failure to transmit to the plan any participant contributions | 2019-12-31 | No |
| Was there a failure to transmit to the plan any participant contributions | 2019-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2019-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2019-12-31 | No |
| Contributions received in cash from employer | 2019-12-31 | $24,576,756 |
| Contributions received in cash from employer | 2019-12-31 | $24,576,756 |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2019-12-31 | $27,425,538 |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2019-12-31 | $27,425,538 |
| Liabilities. Value of benefit claims payable at end of year | 2019-12-31 | $3,320,722 |
| Liabilities. Value of benefit claims payable at end of year | 2019-12-31 | $3,320,722 |
| Liabilities. Value of benefit claims payable at beginning of year | 2019-12-31 | $3,647,352 |
| Liabilities. Value of benefit claims payable at beginning of year | 2019-12-31 | $3,647,352 |
| Did the plan have assets held for investment | 2019-12-31 | Yes |
| Did the plan have assets held for investment | 2019-12-31 | Yes |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2019-12-31 | No |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2019-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2019-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2019-12-31 | No |
| Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d) | 2019-12-31 | Yes |
| Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d) | 2019-12-31 | Yes |
| Opinion of an independent qualified public accountant for this plan | 2019-12-31 | Disclaimer |
| Opinion of an independent qualified public accountant for this plan | 2019-12-31 | Disclaimer |
| Accountancy firm name | 2019-12-31 | EIDE BAILLY LLP |
| Accountancy firm name | 2019-12-31 | EIDE BAILLY LLP |
| Accountancy firm EIN | 2019-12-31 | 450250958 |
| Accountancy firm EIN | 2019-12-31 | 450250958 |
| 2018 : NORTHWESTERN ENERGY FLEXIBLE COMPENSATION PLAN 2018 401k financial data |
|---|
| Total unrealized appreciation/depreciation of assets | 2018-12-31 | $0 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2018-12-31 | $3,889,882 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2018-12-31 | $4,443,242 |
| Total income from all sources (including contributions) | 2018-12-31 | $29,768,645 |
| Total loss/gain on sale of assets | 2018-12-31 | $0 |
| Total of all expenses incurred | 2018-12-31 | $31,444,908 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2018-12-31 | $30,394,956 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2018-12-31 | $30,556,631 |
| Value of total assets at end of year | 2018-12-31 | $19,723,987 |
| Value of total assets at beginning of year | 2018-12-31 | $21,953,610 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2018-12-31 | $1,049,952 |
| Total interest from all sources | 2018-12-31 | $0 |
| Total dividends received (eg from common stock, registered investment company shares) | 2018-12-31 | $101,592 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2018-12-31 | No |
| Total dividends received from registered investment company shares (eg mutual funds) | 2018-12-31 | $101,592 |
| Administrative expenses professional fees incurred | 2018-12-31 | $977,878 |
| Was this plan covered by a fidelity bond | 2018-12-31 | Yes |
| Value of fidelity bond cover | 2018-12-31 | $5,000,000 |
| Were there any nonexempt tranactions with any party-in-interest | 2018-12-31 | No |
| Contributions received from participants | 2018-12-31 | $5,437,354 |
| Participant contributions at end of year | 2018-12-31 | $14,596 |
| Participant contributions at beginning of year | 2018-12-31 | $12,065 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2018-12-31 | $1,038,452 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2018-12-31 | $1,561,345 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2018-12-31 | $150,811 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2018-12-31 | $0 |
| Liabilities. Value of operating payables at end of year | 2018-12-31 | $91,719 |
| Liabilities. Value of operating payables at beginning of year | 2018-12-31 | $82,387 |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2018-12-31 | No |
| Value of net income/loss | 2018-12-31 | $-1,676,263 |
| Value of net assets at end of year (total assets less liabilities) | 2018-12-31 | $15,834,105 |
| Value of net assets at beginning of year (total assets less liabilities) | 2018-12-31 | $17,510,368 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2018-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2018-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2018-12-31 | No |
| Investment advisory and management fees | 2018-12-31 | $72,074 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2018-12-31 | $8,263,203 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2018-12-31 | $8,696,112 |
| Value of interest in common/collective trusts at end of year | 2018-12-31 | $10,407,736 |
| Value of interest in common/collective trusts at beginning of year | 2018-12-31 | $11,684,088 |
| Expenses. Payments to insurance carriers foe the provision of benefits | 2018-12-31 | $2,502,539 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2018-12-31 | $-584,502 |
| Net investment gain or loss from common/collective trusts | 2018-12-31 | $-305,076 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2018-12-31 | Yes |
| Was there a failure to transmit to the plan any participant contributions | 2018-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2018-12-31 | No |
| Contributions received in cash from employer | 2018-12-31 | $25,119,277 |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2018-12-31 | $27,892,417 |
| Liabilities. Value of benefit claims payable at end of year | 2018-12-31 | $3,647,352 |
| Liabilities. Value of benefit claims payable at beginning of year | 2018-12-31 | $4,360,855 |
| Did the plan have assets held for investment | 2018-12-31 | Yes |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2018-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2018-12-31 | No |
| Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d) | 2018-12-31 | Yes |
| Opinion of an independent qualified public accountant for this plan | 2018-12-31 | Disclaimer |
| Accountancy firm name | 2018-12-31 | EIDE BAILLY LLP |
| Accountancy firm EIN | 2018-12-31 | 450250958 |
| 2017 : NORTHWESTERN ENERGY FLEXIBLE COMPENSATION PLAN 2017 401k financial data |
|---|
| Total unrealized appreciation/depreciation of assets | 2017-12-31 | $0 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2017-12-31 | $4,443,242 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2017-12-31 | $3,651,803 |
| Total income from all sources (including contributions) | 2017-12-31 | $30,630,704 |
| Total loss/gain on sale of assets | 2017-12-31 | $0 |
| Total of all expenses incurred | 2017-12-31 | $28,480,174 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2017-12-31 | $27,364,230 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2017-12-31 | $27,865,367 |
| Value of total assets at end of year | 2017-12-31 | $21,953,610 |
| Value of total assets at beginning of year | 2017-12-31 | $19,011,641 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2017-12-31 | $1,115,944 |
| Total interest from all sources | 2017-12-31 | $0 |
| Total dividends received (eg from common stock, registered investment company shares) | 2017-12-31 | $45,223 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2017-12-31 | No |
| Total dividends received from registered investment company shares (eg mutual funds) | 2017-12-31 | $45,223 |
| Administrative expenses professional fees incurred | 2017-12-31 | $1,045,975 |
| Was this plan covered by a fidelity bond | 2017-12-31 | Yes |
| Value of fidelity bond cover | 2017-12-31 | $5,000,000 |
| Were there any nonexempt tranactions with any party-in-interest | 2017-12-31 | No |
| Contributions received from participants | 2017-12-31 | $5,157,908 |
| Participant contributions at end of year | 2017-12-31 | $12,065 |
| Participant contributions at beginning of year | 2017-12-31 | $17,388 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2017-12-31 | $1,561,345 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2017-12-31 | $389,418 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2017-12-31 | $0 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2017-12-31 | $121,489 |
| Liabilities. Value of operating payables at end of year | 2017-12-31 | $82,387 |
| Liabilities. Value of operating payables at beginning of year | 2017-12-31 | $113,339 |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2017-12-31 | No |
| Value of net income/loss | 2017-12-31 | $2,150,530 |
| Value of net assets at end of year (total assets less liabilities) | 2017-12-31 | $17,510,368 |
| Value of net assets at beginning of year (total assets less liabilities) | 2017-12-31 | $15,359,838 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2017-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2017-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2017-12-31 | No |
| Investment advisory and management fees | 2017-12-31 | $69,969 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2017-12-31 | $8,696,112 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2017-12-31 | $8,137,055 |
| Value of interest in common/collective trusts at end of year | 2017-12-31 | $11,684,088 |
| Value of interest in common/collective trusts at beginning of year | 2017-12-31 | $10,467,780 |
| Expenses. Payments to insurance carriers foe the provision of benefits | 2017-12-31 | $2,591,058 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2017-12-31 | $913,834 |
| Net investment gain or loss from common/collective trusts | 2017-12-31 | $1,806,280 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2017-12-31 | Yes |
| Was there a failure to transmit to the plan any participant contributions | 2017-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2017-12-31 | No |
| Contributions received in cash from employer | 2017-12-31 | $22,707,459 |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2017-12-31 | $24,773,172 |
| Liabilities. Value of benefit claims payable at end of year | 2017-12-31 | $4,360,855 |
| Liabilities. Value of benefit claims payable at beginning of year | 2017-12-31 | $3,416,975 |
| Did the plan have assets held for investment | 2017-12-31 | Yes |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2017-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2017-12-31 | No |
| Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d) | 2017-12-31 | Yes |
| Opinion of an independent qualified public accountant for this plan | 2017-12-31 | Disclaimer |
| Accountancy firm name | 2017-12-31 | EIDE BAILLY LLP |
| Accountancy firm EIN | 2017-12-31 | 450250958 |
| 2016 : NORTHWESTERN ENERGY FLEXIBLE COMPENSATION PLAN 2016 401k financial data |
|---|
| Total unrealized appreciation/depreciation of assets | 2016-12-31 | $0 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2016-12-31 | $3,651,803 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2016-12-31 | $3,654,755 |
| Total income from all sources (including contributions) | 2016-12-31 | $28,953,302 |
| Total loss/gain on sale of assets | 2016-12-31 | $0 |
| Total of all expenses incurred | 2016-12-31 | $27,963,557 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2016-12-31 | $26,748,882 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2016-12-31 | $27,604,465 |
| Value of total assets at end of year | 2016-12-31 | $19,011,641 |
| Value of total assets at beginning of year | 2016-12-31 | $18,024,848 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2016-12-31 | $1,214,675 |
| Total interest from all sources | 2016-12-31 | $0 |
| Total dividends received (eg from common stock, registered investment company shares) | 2016-12-31 | $41,848 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2016-12-31 | No |
| Total dividends received from registered investment company shares (eg mutual funds) | 2016-12-31 | $41,848 |
| Administrative expenses professional fees incurred | 2016-12-31 | $1,027,226 |
| Was this plan covered by a fidelity bond | 2016-12-31 | Yes |
| Value of fidelity bond cover | 2016-12-31 | $5,000,000 |
| Were there any nonexempt tranactions with any party-in-interest | 2016-12-31 | No |
| Contributions received from participants | 2016-12-31 | $4,977,316 |
| Participant contributions at end of year | 2016-12-31 | $17,388 |
| Participant contributions at beginning of year | 2016-12-31 | $14,965 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2016-12-31 | $389,418 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2016-12-31 | $36,958 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2016-12-31 | $121,489 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2016-12-31 | $196,666 |
| Administrative expenses (other) incurred | 2016-12-31 | $121,455 |
| Liabilities. Value of operating payables at end of year | 2016-12-31 | $113,339 |
| Liabilities. Value of operating payables at beginning of year | 2016-12-31 | $107,190 |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2016-12-31 | No |
| Value of net income/loss | 2016-12-31 | $989,745 |
| Value of net assets at end of year (total assets less liabilities) | 2016-12-31 | $15,359,838 |
| Value of net assets at beginning of year (total assets less liabilities) | 2016-12-31 | $14,370,093 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2016-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2016-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2016-12-31 | No |
| Investment advisory and management fees | 2016-12-31 | $65,994 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2016-12-31 | $8,137,055 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2016-12-31 | $7,651,330 |
| Value of interest in common/collective trusts at end of year | 2016-12-31 | $10,467,780 |
| Value of interest in common/collective trusts at beginning of year | 2016-12-31 | $10,321,594 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2016-12-31 | $1 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2016-12-31 | $1 |
| Expenses. Payments to insurance carriers foe the provision of benefits | 2016-12-31 | $2,915,918 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2016-12-31 | $343,877 |
| Net investment gain or loss from common/collective trusts | 2016-12-31 | $963,112 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2016-12-31 | Yes |
| Was there a failure to transmit to the plan any participant contributions | 2016-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2016-12-31 | No |
| Contributions received in cash from employer | 2016-12-31 | $22,627,149 |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2016-12-31 | $23,832,964 |
| Liabilities. Value of benefit claims payable at end of year | 2016-12-31 | $3,416,975 |
| Liabilities. Value of benefit claims payable at beginning of year | 2016-12-31 | $3,350,899 |
| Did the plan have assets held for investment | 2016-12-31 | Yes |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2016-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2016-12-31 | No |
| Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d) | 2016-12-31 | Yes |
| Opinion of an independent qualified public accountant for this plan | 2016-12-31 | Disclaimer |
| Accountancy firm name | 2016-12-31 | EIDE BAILLY LLP |
| Accountancy firm EIN | 2016-12-31 | 450250958 |
| 2015 : NORTHWESTERN ENERGY FLEXIBLE COMPENSATION PLAN 2015 401k financial data |
|---|
| Total unrealized appreciation/depreciation of assets | 2015-12-31 | $0 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2015-12-31 | $3,654,755 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2015-12-31 | $3,572,516 |
| Total income from all sources (including contributions) | 2015-12-31 | $29,555,162 |
| Total loss/gain on sale of assets | 2015-12-31 | $0 |
| Total of all expenses incurred | 2015-12-31 | $29,926,916 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2015-12-31 | $28,674,184 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2015-12-31 | $29,485,388 |
| Value of total assets at end of year | 2015-12-31 | $18,024,848 |
| Value of total assets at beginning of year | 2015-12-31 | $18,314,363 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2015-12-31 | $1,252,732 |
| Total interest from all sources | 2015-12-31 | $0 |
| Total dividends received (eg from common stock, registered investment company shares) | 2015-12-31 | $27,908 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2015-12-31 | No |
| Total dividends received from registered investment company shares (eg mutual funds) | 2015-12-31 | $27,908 |
| Administrative expenses professional fees incurred | 2015-12-31 | $989,975 |
| Was this plan covered by a fidelity bond | 2015-12-31 | Yes |
| Value of fidelity bond cover | 2015-12-31 | $3,000,000 |
| Were there any nonexempt tranactions with any party-in-interest | 2015-12-31 | No |
| Contributions received from participants | 2015-12-31 | $5,090,180 |
| Participant contributions at end of year | 2015-12-31 | $14,965 |
| Participant contributions at beginning of year | 2015-12-31 | $14,971 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2015-12-31 | $36,958 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2015-12-31 | $325,094 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2015-12-31 | $196,666 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2015-12-31 | $257,208 |
| Administrative expenses (other) incurred | 2015-12-31 | $196,666 |
| Liabilities. Value of operating payables at end of year | 2015-12-31 | $107,190 |
| Liabilities. Value of operating payables at beginning of year | 2015-12-31 | $80,117 |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2015-12-31 | No |
| Value of net income/loss | 2015-12-31 | $-371,754 |
| Value of net assets at end of year (total assets less liabilities) | 2015-12-31 | $14,370,093 |
| Value of net assets at beginning of year (total assets less liabilities) | 2015-12-31 | $14,741,847 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2015-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2015-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2015-12-31 | No |
| Investment advisory and management fees | 2015-12-31 | $66,091 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2015-12-31 | $7,651,330 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2015-12-31 | $7,704,249 |
| Value of interest in common/collective trusts at end of year | 2015-12-31 | $10,321,594 |
| Value of interest in common/collective trusts at beginning of year | 2015-12-31 | $10,270,049 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2015-12-31 | $1 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2015-12-31 | $0 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2015-12-31 | $0 |
| Value of funds held in insurance company general accounts (unallocated contracts) at beginning of year | 2015-12-31 | $0 |
| Expenses. Payments to insurance carriers foe the provision of benefits | 2015-12-31 | $2,921,881 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2015-12-31 | $-80,827 |
| Net investment gain or loss from common/collective trusts | 2015-12-31 | $122,693 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2015-12-31 | No |
| Was there a failure to transmit to the plan any participant contributions | 2015-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2015-12-31 | No |
| Contributions received in cash from employer | 2015-12-31 | $24,395,208 |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2015-12-31 | $25,752,303 |
| Liabilities. Value of benefit claims payable at end of year | 2015-12-31 | $3,350,899 |
| Liabilities. Value of benefit claims payable at beginning of year | 2015-12-31 | $3,235,191 |
| Did the plan have assets held for investment | 2015-12-31 | Yes |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2015-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2015-12-31 | No |
| Aggregate proceeds on sale of assets | 2015-12-31 | $0 |
| Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d) | 2015-12-31 | Yes |
| Opinion of an independent qualified public accountant for this plan | 2015-12-31 | Disclaimer |
| Accountancy firm name | 2015-12-31 | EIDE BAILLY LLP |
| Accountancy firm EIN | 2015-12-31 | 450250958 |
| 2014 : NORTHWESTERN ENERGY FLEXIBLE COMPENSATION PLAN 2014 401k financial data |
|---|
| Total unrealized appreciation/depreciation of assets | 2014-12-31 | $0 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2014-12-31 | $3,572,516 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2014-12-31 | $3,765,349 |
| Total income from all sources (including contributions) | 2014-12-31 | $24,948,309 |
| Total loss/gain on sale of assets | 2014-12-31 | $90 |
| Total of all expenses incurred | 2014-12-31 | $24,120,091 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2014-12-31 | $22,850,604 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2014-12-31 | $23,612,030 |
| Value of total assets at end of year | 2014-12-31 | $18,314,363 |
| Value of total assets at beginning of year | 2014-12-31 | $17,678,978 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2014-12-31 | $1,269,487 |
| Total interest from all sources | 2014-12-31 | $0 |
| Total dividends received (eg from common stock, registered investment company shares) | 2014-12-31 | $38,753 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2014-12-31 | No |
| Total dividends received from registered investment company shares (eg mutual funds) | 2014-12-31 | $38,753 |
| Administrative expenses professional fees incurred | 2014-12-31 | $950,275 |
| Was this plan covered by a fidelity bond | 2014-12-31 | Yes |
| Value of fidelity bond cover | 2014-12-31 | $3,000,000 |
| Were there any nonexempt tranactions with any party-in-interest | 2014-12-31 | No |
| Contributions received from participants | 2014-12-31 | $5,033,550 |
| Participant contributions at end of year | 2014-12-31 | $14,971 |
| Participant contributions at beginning of year | 2014-12-31 | $15,536 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2014-12-31 | $325,094 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2014-12-31 | $661,736 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2014-12-31 | $257,208 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2014-12-31 | $465,869 |
| Administrative expenses (other) incurred | 2014-12-31 | $257,208 |
| Liabilities. Value of operating payables at end of year | 2014-12-31 | $80,117 |
| Liabilities. Value of operating payables at beginning of year | 2014-12-31 | $98,291 |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2014-12-31 | No |
| Value of net income/loss | 2014-12-31 | $828,218 |
| Value of net assets at end of year (total assets less liabilities) | 2014-12-31 | $14,741,847 |
| Value of net assets at beginning of year (total assets less liabilities) | 2014-12-31 | $13,913,629 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2014-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2014-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2014-12-31 | No |
| Investment advisory and management fees | 2014-12-31 | $62,004 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2014-12-31 | $7,704,249 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2014-12-31 | $7,482,882 |
| Value of interest in common/collective trusts at end of year | 2014-12-31 | $10,270,049 |
| Value of interest in common/collective trusts at beginning of year | 2014-12-31 | $9,518,824 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2014-12-31 | $0 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2014-12-31 | $0 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2014-12-31 | $0 |
| Value of funds held in insurance company general accounts (unallocated contracts) at end of year | 2014-12-31 | $0 |
| Value of funds held in insurance company general accounts (unallocated contracts) at beginning of year | 2014-12-31 | $0 |
| Expenses. Payments to insurance carriers foe the provision of benefits | 2014-12-31 | $2,767,262 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2014-12-31 | $182,614 |
| Net investment gain or loss from common/collective trusts | 2014-12-31 | $1,114,822 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2014-12-31 | No |
| Was there a failure to transmit to the plan any participant contributions | 2014-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2014-12-31 | No |
| Contributions received in cash from employer | 2014-12-31 | $18,578,480 |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2014-12-31 | $20,083,342 |
| Liabilities. Value of benefit claims payable at end of year | 2014-12-31 | $3,235,191 |
| Liabilities. Value of benefit claims payable at beginning of year | 2014-12-31 | $3,201,189 |
| Did the plan have assets held for investment | 2014-12-31 | Yes |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2014-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2014-12-31 | No |
| Aggregate proceeds on sale of assets | 2014-12-31 | $90 |
| Aggregate carrying amount (costs) on sale of assets | 2014-12-31 | $0 |
| Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d) | 2014-12-31 | Yes |
| Opinion of an independent qualified public accountant for this plan | 2014-12-31 | Disclaimer |
| Accountancy firm name | 2014-12-31 | EIDE BAILLY LLP |
| Accountancy firm EIN | 2014-12-31 | 450250958 |
| 2013 : NORTHWESTERN ENERGY FLEXIBLE COMPENSATION PLAN 2013 401k financial data |
|---|
| Total unrealized appreciation/depreciation of assets | 2013-12-31 | $0 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2013-12-31 | $3,765,349 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2013-12-31 | $2,558,386 |
| Total income from all sources (including contributions) | 2013-12-31 | $26,589,716 |
| Total loss/gain on sale of assets | 2013-12-31 | $19 |
| Total of all expenses incurred | 2013-12-31 | $25,247,927 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2013-12-31 | $24,085,083 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2013-12-31 | $23,998,857 |
| Value of total assets at end of year | 2013-12-31 | $17,678,978 |
| Value of total assets at beginning of year | 2013-12-31 | $15,130,226 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2013-12-31 | $1,162,844 |
| Total interest from all sources | 2013-12-31 | $0 |
| Total dividends received (eg from common stock, registered investment company shares) | 2013-12-31 | $555,657 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2013-12-31 | No |
| Total dividends received from registered investment company shares (eg mutual funds) | 2013-12-31 | $555,657 |
| Administrative expenses professional fees incurred | 2013-12-31 | $1,107,245 |
| Was this plan covered by a fidelity bond | 2013-12-31 | Yes |
| Value of fidelity bond cover | 2013-12-31 | $3,000,000 |
| Were there any nonexempt tranactions with any party-in-interest | 2013-12-31 | No |
| Contributions received from participants | 2013-12-31 | $5,483,788 |
| Participant contributions at end of year | 2013-12-31 | $15,536 |
| Participant contributions at beginning of year | 2013-12-31 | $19,752 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2013-12-31 | $661,736 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2013-12-31 | $483,960 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2013-12-31 | $465,869 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2013-12-31 | $680 |
| Other income not declared elsewhere | 2013-12-31 | $134 |
| Liabilities. Value of operating payables at end of year | 2013-12-31 | $98,291 |
| Liabilities. Value of operating payables at beginning of year | 2013-12-31 | $37,195 |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2013-12-31 | No |
| Value of net income/loss | 2013-12-31 | $1,341,789 |
| Value of net assets at end of year (total assets less liabilities) | 2013-12-31 | $13,913,629 |
| Value of net assets at beginning of year (total assets less liabilities) | 2013-12-31 | $12,571,840 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2013-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2013-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2013-12-31 | No |
| Investment advisory and management fees | 2013-12-31 | $55,599 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2013-12-31 | $7,482,882 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2013-12-31 | $6,529,530 |
| Value of interest in common/collective trusts at end of year | 2013-12-31 | $9,518,824 |
| Value of interest in common/collective trusts at beginning of year | 2013-12-31 | $8,096,984 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2013-12-31 | $0 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2013-12-31 | $0 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2013-12-31 | $0 |
| Value of funds held in insurance company general accounts (unallocated contracts) at end of year | 2013-12-31 | $0 |
| Value of funds held in insurance company general accounts (unallocated contracts) at beginning of year | 2013-12-31 | $0 |
| Expenses. Payments to insurance carriers foe the provision of benefits | 2013-12-31 | $2,643,443 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2013-12-31 | $97,818 |
| Net investment gain or loss from common/collective trusts | 2013-12-31 | $1,937,231 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2013-12-31 | Yes |
| Was there a failure to transmit to the plan any participant contributions | 2013-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2013-12-31 | No |
| Contributions received in cash from employer | 2013-12-31 | $18,515,069 |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2013-12-31 | $21,441,640 |
| Liabilities. Value of benefit claims payable at end of year | 2013-12-31 | $3,201,189 |
| Liabilities. Value of benefit claims payable at beginning of year | 2013-12-31 | $2,520,511 |
| Did the plan have assets held for investment | 2013-12-31 | Yes |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2013-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2013-12-31 | No |
| Aggregate proceeds on sale of assets | 2013-12-31 | $19 |
| Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d) | 2013-12-31 | Yes |
| Opinion of an independent qualified public accountant for this plan | 2013-12-31 | Disclaimer |
| Accountancy firm name | 2013-12-31 | EIDE BAILLY LLP |
| Accountancy firm EIN | 2013-12-31 | 450250958 |
| 2012 : NORTHWESTERN ENERGY FLEXIBLE COMPENSATION PLAN 2012 401k financial data |
|---|
| Total unrealized appreciation/depreciation of assets | 2012-12-31 | $0 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2012-12-31 | $2,558,386 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2012-12-31 | $2,308,465 |
| Total income from all sources (including contributions) | 2012-12-31 | $26,092,800 |
| Total loss/gain on sale of assets | 2012-12-31 | $228 |
| Total of all expenses incurred | 2012-12-31 | $25,016,668 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2012-12-31 | $24,033,229 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2012-12-31 | $24,474,229 |
| Value of total assets at end of year | 2012-12-31 | $15,130,226 |
| Value of total assets at beginning of year | 2012-12-31 | $13,804,173 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2012-12-31 | $983,439 |
| Total interest from all sources | 2012-12-31 | $0 |
| Total dividends received (eg from common stock, registered investment company shares) | 2012-12-31 | $605,509 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2012-12-31 | No |
| Total dividends received from registered investment company shares (eg mutual funds) | 2012-12-31 | $605,509 |
| Administrative expenses professional fees incurred | 2012-12-31 | $899,378 |
| Was this plan covered by a fidelity bond | 2012-12-31 | Yes |
| Value of fidelity bond cover | 2012-12-31 | $3,000,000 |
| Were there any nonexempt tranactions with any party-in-interest | 2012-12-31 | No |
| Contributions received from participants | 2012-12-31 | $5,947,163 |
| Participant contributions at end of year | 2012-12-31 | $19,752 |
| Participant contributions at beginning of year | 2012-12-31 | $21,197 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2012-12-31 | $483,960 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2012-12-31 | $79,743 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2012-12-31 | $680 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2012-12-31 | $42,998 |
| Other income not declared elsewhere | 2012-12-31 | $-42,057 |
| Liabilities. Value of operating payables at end of year | 2012-12-31 | $37,195 |
| Liabilities. Value of operating payables at beginning of year | 2012-12-31 | $20,003 |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2012-12-31 | No |
| Value of net income/loss | 2012-12-31 | $1,076,132 |
| Value of net assets at end of year (total assets less liabilities) | 2012-12-31 | $12,571,840 |
| Value of net assets at beginning of year (total assets less liabilities) | 2012-12-31 | $11,495,708 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2012-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2012-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2012-12-31 | No |
| Investment advisory and management fees | 2012-12-31 | $49,788 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2012-12-31 | $6,529,530 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2012-12-31 | $6,606,991 |
| Value of interest in common/collective trusts at end of year | 2012-12-31 | $8,096,984 |
| Value of interest in common/collective trusts at beginning of year | 2012-12-31 | $7,096,242 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2012-12-31 | $0 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2012-12-31 | $0 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2012-12-31 | $0 |
| Value of funds held in insurance company general accounts (unallocated contracts) at end of year | 2012-12-31 | $0 |
| Value of funds held in insurance company general accounts (unallocated contracts) at beginning of year | 2012-12-31 | $0 |
| Expenses. Payments to insurance carriers foe the provision of benefits | 2012-12-31 | $2,309,939 |
| Net investment gain or loss from common/collective trusts | 2012-12-31 | $937,984 |
| Net gain/loss from 103.12 investment entities | 2012-12-31 | $116,907 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2012-12-31 | Yes |
| Was there a failure to transmit to the plan any participant contributions | 2012-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2012-12-31 | No |
| Contributions received in cash from employer | 2012-12-31 | $18,527,066 |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2012-12-31 | $21,723,290 |
| Contract administrator fees | 2012-12-31 | $34,273 |
| Liabilities. Value of benefit claims payable at end of year | 2012-12-31 | $2,520,511 |
| Liabilities. Value of benefit claims payable at beginning of year | 2012-12-31 | $2,245,464 |
| Did the plan have assets held for investment | 2012-12-31 | Yes |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2012-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2012-12-31 | No |
| Aggregate proceeds on sale of assets | 2012-12-31 | $228 |
| Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d) | 2012-12-31 | Yes |
| Opinion of an independent qualified public accountant for this plan | 2012-12-31 | Disclaimer |
| Accountancy firm name | 2012-12-31 | EIDE BAILLY, LLP |
| Accountancy firm EIN | 2012-12-31 | 450250958 |
| 2011 : NORTHWESTERN ENERGY FLEXIBLE COMPENSATION PLAN 2011 401k financial data |
|---|
| Total unrealized appreciation/depreciation of assets | 2011-12-31 | $0 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2011-12-31 | $2,308,465 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2011-12-31 | $1,983,692 |
| Total income from all sources (including contributions) | 2011-12-31 | $18,515,025 |
| Total loss/gain on sale of assets | 2011-12-31 | $207 |
| Total of all expenses incurred | 2011-12-31 | $19,391,452 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2011-12-31 | $18,791,392 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2011-12-31 | $18,227,740 |
| Value of total assets at end of year | 2011-12-31 | $13,804,173 |
| Value of total assets at beginning of year | 2011-12-31 | $14,355,827 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2011-12-31 | $600,060 |
| Total interest from all sources | 2011-12-31 | $0 |
| Total dividends received (eg from common stock, registered investment company shares) | 2011-12-31 | $26,757 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2011-12-31 | No |
| Total dividends received from registered investment company shares (eg mutual funds) | 2011-12-31 | $26,757 |
| Administrative expenses professional fees incurred | 2011-12-31 | $524,988 |
| Was this plan covered by a fidelity bond | 2011-12-31 | Yes |
| Value of fidelity bond cover | 2011-12-31 | $3,000,000 |
| Were there any nonexempt tranactions with any party-in-interest | 2011-12-31 | No |
| Contributions received from participants | 2011-12-31 | $4,052,958 |
| Participant contributions at end of year | 2011-12-31 | $21,197 |
| Participant contributions at beginning of year | 2011-12-31 | $17,032 |
| Income. Received or receivable in cash from other sources (including rollovers) | 2011-12-31 | $790,910 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2011-12-31 | $79,743 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2011-12-31 | $171,271 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2011-12-31 | $42,998 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2011-12-31 | $40,369 |
| Liabilities. Value of operating payables at end of year | 2011-12-31 | $20,003 |
| Liabilities. Value of operating payables at beginning of year | 2011-12-31 | $19,157 |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2011-12-31 | No |
| Value of net income/loss | 2011-12-31 | $-876,427 |
| Value of net assets at end of year (total assets less liabilities) | 2011-12-31 | $11,495,708 |
| Value of net assets at beginning of year (total assets less liabilities) | 2011-12-31 | $12,372,135 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2011-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2011-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2011-12-31 | No |
| Investment advisory and management fees | 2011-12-31 | $47,239 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2011-12-31 | $6,606,991 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2011-12-31 | $7,020,628 |
| Value of interest in common/collective trusts at end of year | 2011-12-31 | $7,096,242 |
| Value of interest in common/collective trusts at beginning of year | 2011-12-31 | $7,146,896 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2011-12-31 | $0 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2011-12-31 | $0 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2011-12-31 | $0 |
| Value of funds held in insurance company general accounts (unallocated contracts) at end of year | 2011-12-31 | $0 |
| Value of funds held in insurance company general accounts (unallocated contracts) at beginning of year | 2011-12-31 | $0 |
| Expenses. Payments to insurance carriers foe the provision of benefits | 2011-12-31 | $1,944,636 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2011-12-31 | $34,607 |
| Net investment gain or loss from common/collective trusts | 2011-12-31 | $225,714 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2011-12-31 | Yes |
| Was there a failure to transmit to the plan any participant contributions | 2011-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2011-12-31 | No |
| Contributions received in cash from employer | 2011-12-31 | $13,383,872 |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2011-12-31 | $16,846,756 |
| Contract administrator fees | 2011-12-31 | $27,833 |
| Liabilities. Value of benefit claims payable at end of year | 2011-12-31 | $2,245,464 |
| Liabilities. Value of benefit claims payable at beginning of year | 2011-12-31 | $1,924,166 |
| Did the plan have assets held for investment | 2011-12-31 | Yes |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2011-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2011-12-31 | No |
| Aggregate proceeds on sale of assets | 2011-12-31 | $207 |
| Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d) | 2011-12-31 | Yes |
| Opinion of an independent qualified public accountant for this plan | 2011-12-31 | Disclaimer |
| Accountancy firm name | 2011-12-31 | EIDE BAILLY, LLP |
| Accountancy firm EIN | 2011-12-31 | 450250958 |
| 2010 : NORTHWESTERN ENERGY FLEXIBLE COMPENSATION PLAN 2010 401k financial data |
|---|
| Total unrealized appreciation/depreciation of assets | 2010-12-31 | $0 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2010-12-31 | $1,983,692 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2010-12-31 | $1,874,287 |
| Total income from all sources (including contributions) | 2010-12-31 | $22,346,649 |
| Total loss/gain on sale of assets | 2010-12-31 | $3,204 |
| Total of all expenses incurred | 2010-12-31 | $20,995,888 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2010-12-31 | $20,513,401 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2010-12-31 | $20,743,761 |
| Value of total assets at end of year | 2010-12-31 | $14,355,827 |
| Value of total assets at beginning of year | 2010-12-31 | $12,895,661 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2010-12-31 | $482,487 |
| Total interest from all sources | 2010-12-31 | $0 |
| Total dividends received (eg from common stock, registered investment company shares) | 2010-12-31 | $32,237 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2010-12-31 | No |
| Total dividends received from registered investment company shares (eg mutual funds) | 2010-12-31 | $32,237 |
| Administrative expenses professional fees incurred | 2010-12-31 | $416,020 |
| Was this plan covered by a fidelity bond | 2010-12-31 | Yes |
| Value of fidelity bond cover | 2010-12-31 | $3,000,000 |
| Were there any nonexempt tranactions with any party-in-interest | 2010-12-31 | No |
| Contributions received from participants | 2010-12-31 | $3,435,409 |
| Participant contributions at end of year | 2010-12-31 | $17,032 |
| Participant contributions at beginning of year | 2010-12-31 | $9,637 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2010-12-31 | $171,271 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2010-12-31 | $313,433 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2010-12-31 | $40,369 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2010-12-31 | $36,033 |
| Liabilities. Value of operating payables at end of year | 2010-12-31 | $19,157 |
| Liabilities. Value of operating payables at beginning of year | 2010-12-31 | $14,034 |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2010-12-31 | No |
| Value of net income/loss | 2010-12-31 | $1,350,761 |
| Value of net assets at end of year (total assets less liabilities) | 2010-12-31 | $12,372,135 |
| Value of net assets at beginning of year (total assets less liabilities) | 2010-12-31 | $11,021,374 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2010-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2010-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2010-12-31 | No |
| Investment advisory and management fees | 2010-12-31 | $42,904 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2010-12-31 | $7,020,628 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2010-12-31 | $6,322,359 |
| Value of interest in common/collective trusts at end of year | 2010-12-31 | $7,146,896 |
| Value of interest in common/collective trusts at beginning of year | 2010-12-31 | $6,250,232 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2010-12-31 | $0 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2010-12-31 | $0 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2010-12-31 | $0 |
| Value of funds held in insurance company general accounts (unallocated contracts) at end of year | 2010-12-31 | $0 |
| Value of funds held in insurance company general accounts (unallocated contracts) at beginning of year | 2010-12-31 | $0 |
| Expenses. Payments to insurance carriers foe the provision of benefits | 2010-12-31 | $1,893,960 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2010-12-31 | $711,032 |
| Net investment gain or loss from common/collective trusts | 2010-12-31 | $856,415 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2010-12-31 | No |
| Was there a failure to transmit to the plan any participant contributions | 2010-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2010-12-31 | No |
| Contributions received in cash from employer | 2010-12-31 | $17,308,352 |
| Employer contributions (assets) at beginning of year | 2010-12-31 | $0 |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2010-12-31 | $18,619,441 |
| Contract administrator fees | 2010-12-31 | $23,563 |
| Liabilities. Value of benefit claims payable at end of year | 2010-12-31 | $1,924,166 |
| Liabilities. Value of benefit claims payable at beginning of year | 2010-12-31 | $1,824,220 |
| Did the plan have assets held for investment | 2010-12-31 | Yes |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2010-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2010-12-31 | No |
| Aggregate proceeds on sale of assets | 2010-12-31 | $3,204 |
| Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d) | 2010-12-31 | Yes |
| Opinion of an independent qualified public accountant for this plan | 2010-12-31 | Disclaimer |
| Accountancy firm name | 2010-12-31 | EIDE BAILLY LLP |
| Accountancy firm EIN | 2010-12-31 | 450250958 |
