BLACKROCK INSTITUTIONAL TRUST COMPANY, N.A. has sponsored the creation of one or more 401k plans.
Submission information for form 5500 for 401k plan 1-3 YEAR GOVERNMENT BOND INDEX FUND
| Measure | Date | Value |
|---|
| 2023 : 1-3 YEAR GOVERNMENT BOND INDEX FUND 2023 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2023-12-31 | $65,330,063 |
| Total unrealized appreciation/depreciation of assets | 2023-12-31 | $65,330,063 |
| Total transfer of assets to this plan | 2023-12-31 | $273,095,185 |
| Total transfer of assets from this plan | 2023-12-31 | $1,157,943,982 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2023-12-31 | $1,199,118,733 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2023-12-31 | $2,115,923,872 |
| Total income from all sources (including contributions) | 2023-12-31 | $89,979,834 |
| Total loss/gain on sale of assets | 2023-12-31 | $-48,284,203 |
| Total of all expenses incurred | 2023-12-31 | $82,568 |
| Value of total assets at end of year | 2023-12-31 | $2,817,870,305 |
| Value of total assets at beginning of year | 2023-12-31 | $4,529,626,975 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2023-12-31 | $82,568 |
| Total interest from all sources | 2023-12-31 | $72,933,974 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2023-12-31 | No |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2023-12-31 | $192,479,718 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2023-12-31 | $160,605,612 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2023-12-31 | $1,199,118,733 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2023-12-31 | $2,115,923,872 |
| Administrative expenses (other) incurred | 2023-12-31 | $-28,149 |
| Total non interest bearing cash at end of year | 2023-12-31 | $1,283,178 |
| Total non interest bearing cash at beginning of year | 2023-12-31 | $640,424 |
| Value of net income/loss | 2023-12-31 | $89,897,266 |
| Value of net assets at end of year (total assets less liabilities) | 2023-12-31 | $1,618,751,572 |
| Value of net assets at beginning of year (total assets less liabilities) | 2023-12-31 | $2,413,703,103 |
| Investment advisory and management fees | 2023-12-31 | $100,731 |
| Interest earned on other investments | 2023-12-31 | $1,245,788 |
| Income. Interest from US Government securities | 2023-12-31 | $71,516,995 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2023-12-31 | $1,019,065,641 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2023-12-31 | $1,971,253,959 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2023-12-31 | $1,971,253,959 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2023-12-31 | $171,191 |
| Asset value of US Government securities at end of year | 2023-12-31 | $1,605,041,768 |
| Asset value of US Government securities at beginning of year | 2023-12-31 | $2,394,894,153 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2023-12-31 | $2,232,827 |
| Aggregate proceeds on sale of assets | 2023-12-31 | $3,084,179,490 |
| Aggregate carrying amount (costs) on sale of assets | 2023-12-31 | $3,132,463,693 |
| Unrealized appreciation/depreciation of other (non real estate) assets | 2023-01-01 | $65,330,063 |
| Total unrealized appreciation/depreciation of assets | 2023-01-01 | $65,330,063 |
| Total transfer of assets to this plan | 2023-01-01 | $273,095,185 |
| Total transfer of assets from this plan | 2023-01-01 | $1,157,943,982 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2023-01-01 | $1,199,118,733 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2023-01-01 | $2,115,923,872 |
| Total income from all sources (including contributions) | 2023-01-01 | $89,979,834 |
| Total loss/gain on sale of assets | 2023-01-01 | $-48,284,203 |
| Total of all expenses incurred | 2023-01-01 | $82,568 |
| Value of total assets at end of year | 2023-01-01 | $2,817,870,305 |
| Value of total assets at beginning of year | 2023-01-01 | $4,529,626,975 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2023-01-01 | $82,568 |
| Total interest from all sources | 2023-01-01 | $72,933,974 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2023-01-01 | No |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2023-01-01 | $192,479,718 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2023-01-01 | $160,605,612 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2023-01-01 | $1,199,118,733 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2023-01-01 | $2,115,923,872 |
| Administrative expenses (other) incurred | 2023-01-01 | $-28,149 |
| Total non interest bearing cash at end of year | 2023-01-01 | $1,283,178 |
| Total non interest bearing cash at beginning of year | 2023-01-01 | $640,424 |
| Value of net income/loss | 2023-01-01 | $89,897,266 |
| Value of net assets at end of year (total assets less liabilities) | 2023-01-01 | $1,618,751,572 |
| Value of net assets at beginning of year (total assets less liabilities) | 2023-01-01 | $2,413,703,103 |
| Investment advisory and management fees | 2023-01-01 | $100,731 |
| Interest earned on other investments | 2023-01-01 | $1,245,788 |
| Income. Interest from US Government securities | 2023-01-01 | $71,516,995 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2023-01-01 | $1,019,065,641 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2023-01-01 | $171,191 |
| Asset value of US Government securities at end of year | 2023-01-01 | $1,605,041,768 |
| Asset value of US Government securities at beginning of year | 2023-01-01 | $2,394,894,153 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2023-01-01 | $2,232,827 |
| Aggregate proceeds on sale of assets | 2023-01-01 | $3,084,179,490 |
| Aggregate carrying amount (costs) on sale of assets | 2023-01-01 | $3,132,463,693 |
| 2022 : 1-3 YEAR GOVERNMENT BOND INDEX FUND 2022 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2022-12-31 | $-58,396,743 |
| Total unrealized appreciation/depreciation of assets | 2022-12-31 | $-58,396,743 |
| Total transfer of assets to this plan | 2022-12-31 | $1,359,394,423 |
| Total transfer of assets from this plan | 2022-12-31 | $812,660,887 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-12-31 | $2,115,923,872 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-12-31 | $1,717,279,186 |
| Total income from all sources (including contributions) | 2022-12-31 | $-92,029,281 |
| Total loss/gain on sale of assets | 2022-12-31 | $-73,212,745 |
| Total of all expenses incurred | 2022-12-31 | $91,387 |
| Value of total assets at end of year | 2022-12-31 | $4,529,626,975 |
| Value of total assets at beginning of year | 2022-12-31 | $3,676,369,421 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2022-12-31 | $91,387 |
| Total interest from all sources | 2022-12-31 | $39,580,207 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2022-12-31 | No |
| Administrative expenses professional fees incurred | 2022-12-31 | $9,967 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2022-12-31 | $160,605,612 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2022-12-31 | $10,603,577 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2022-12-31 | $2,115,923,872 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2022-12-31 | $1,717,279,186 |
| Administrative expenses (other) incurred | 2022-12-31 | $3,300 |
| Total non interest bearing cash at end of year | 2022-12-31 | $640,424 |
| Value of net income/loss | 2022-12-31 | $-92,120,668 |
| Value of net assets at end of year (total assets less liabilities) | 2022-12-31 | $2,413,703,103 |
| Value of net assets at beginning of year (total assets less liabilities) | 2022-12-31 | $1,959,090,235 |
| Investment advisory and management fees | 2022-12-31 | $78,120 |
| Interest earned on other investments | 2022-12-31 | $1,601,352 |
| Income. Interest from US Government securities | 2022-12-31 | $37,843,582 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2022-12-31 | $1,971,253,959 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2022-12-31 | $1,713,641,920 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2022-12-31 | $1,713,641,920 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2022-12-31 | $135,273 |
| Asset value of US Government securities at end of year | 2022-12-31 | $2,394,894,153 |
| Asset value of US Government securities at beginning of year | 2022-12-31 | $1,949,719,876 |
| Asset. Corporate debt instrument debt (other) at end of year | 2022-12-31 | $2,232,827 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2022-12-31 | $2,404,048 |
| Aggregate proceeds on sale of assets | 2022-12-31 | $3,535,495,745 |
| Aggregate carrying amount (costs) on sale of assets | 2022-12-31 | $3,608,708,490 |
| Unrealized appreciation/depreciation of other (non real estate) assets | 2022-01-01 | $-58,396,743 |
| Total unrealized appreciation/depreciation of assets | 2022-01-01 | $-58,396,743 |
| Total transfer of assets to this plan | 2022-01-01 | $1,359,394,423 |
| Total transfer of assets from this plan | 2022-01-01 | $812,660,887 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-01-01 | $2,115,923,872 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-01-01 | $1,717,279,186 |
| Total income from all sources (including contributions) | 2022-01-01 | $-92,029,281 |
| Total loss/gain on sale of assets | 2022-01-01 | $-73,212,745 |
| Total of all expenses incurred | 2022-01-01 | $91,387 |
| Value of total assets at end of year | 2022-01-01 | $4,529,626,975 |
| Value of total assets at beginning of year | 2022-01-01 | $3,676,369,421 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2022-01-01 | $91,387 |
| Total interest from all sources | 2022-01-01 | $39,580,207 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2022-01-01 | No |
| Administrative expenses professional fees incurred | 2022-01-01 | $9,967 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2022-01-01 | $160,605,612 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2022-01-01 | $10,603,577 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2022-01-01 | $2,115,923,872 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2022-01-01 | $1,717,279,186 |
| Administrative expenses (other) incurred | 2022-01-01 | $3,300 |
| Total non interest bearing cash at end of year | 2022-01-01 | $640,424 |
| Value of net income/loss | 2022-01-01 | $-92,120,668 |
| Value of net assets at end of year (total assets less liabilities) | 2022-01-01 | $2,413,703,103 |
| Value of net assets at beginning of year (total assets less liabilities) | 2022-01-01 | $1,959,090,235 |
| Investment advisory and management fees | 2022-01-01 | $78,120 |
| Interest earned on other investments | 2022-01-01 | $1,601,352 |
| Income. Interest from US Government securities | 2022-01-01 | $37,843,582 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2022-01-01 | $1,971,253,959 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2022-01-01 | $135,273 |
| Asset value of US Government securities at end of year | 2022-01-01 | $2,394,894,153 |
| Asset value of US Government securities at beginning of year | 2022-01-01 | $1,949,719,876 |
| Asset. Corporate debt instrument debt (other) at end of year | 2022-01-01 | $2,232,827 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2022-01-01 | $2,404,048 |
| Aggregate proceeds on sale of assets | 2022-01-01 | $3,535,495,745 |
| Aggregate carrying amount (costs) on sale of assets | 2022-01-01 | $3,608,708,490 |
| 2021 : 1-3 YEAR GOVERNMENT BOND INDEX FUND 2021 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2021-12-31 | $-28,312,881 |
| Total unrealized appreciation/depreciation of assets | 2021-12-31 | $-28,312,881 |
| Total transfer of assets to this plan | 2021-12-31 | $664,331,133 |
| Total transfer of assets from this plan | 2021-12-31 | $518,338,869 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2021-12-31 | $1,717,279,186 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2021-12-31 | $1,413,611,416 |
| Total income from all sources (including contributions) | 2021-12-31 | $-9,937,356 |
| Total loss/gain on sale of assets | 2021-12-31 | $7,623,334 |
| Total of all expenses incurred | 2021-12-31 | $79,783 |
| Value of total assets at end of year | 2021-12-31 | $3,676,369,421 |
| Value of total assets at beginning of year | 2021-12-31 | $3,236,726,526 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2021-12-31 | $79,783 |
| Total interest from all sources | 2021-12-31 | $10,752,191 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2021-12-31 | No |
| Administrative expenses professional fees incurred | 2021-12-31 | $9,766 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2021-12-31 | $10,603,577 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2021-12-31 | $92,992,574 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2021-12-31 | $1,717,279,186 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2021-12-31 | $1,413,611,416 |
| Administrative expenses (other) incurred | 2021-12-31 | $3,300 |
| Value of net income/loss | 2021-12-31 | $-10,017,139 |
| Value of net assets at end of year (total assets less liabilities) | 2021-12-31 | $1,959,090,235 |
| Value of net assets at beginning of year (total assets less liabilities) | 2021-12-31 | $1,823,115,110 |
| Investment advisory and management fees | 2021-12-31 | $66,717 |
| Interest earned on other investments | 2021-12-31 | $1,419,998 |
| Income. Interest from US Government securities | 2021-12-31 | $9,231,294 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2021-12-31 | $1,713,641,920 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2021-12-31 | $1,377,071,740 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2021-12-31 | $1,377,071,740 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2021-12-31 | $100,899 |
| Asset value of US Government securities at end of year | 2021-12-31 | $1,949,719,876 |
| Asset value of US Government securities at beginning of year | 2021-12-31 | $1,750,613,306 |
| Asset. Corporate debt instrument debt (other) at end of year | 2021-12-31 | $2,404,048 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2021-12-31 | $16,048,906 |
| Aggregate proceeds on sale of assets | 2021-12-31 | $3,056,031,981 |
| Aggregate carrying amount (costs) on sale of assets | 2021-12-31 | $3,048,408,647 |
| 2020 : 1-3 YEAR GOVERNMENT BOND INDEX FUND 2020 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2020-12-31 | $5,845,595 |
| Total unrealized appreciation/depreciation of assets | 2020-12-31 | $5,845,595 |
| Total transfer of assets to this plan | 2020-12-31 | $1,299,516,073 |
| Total transfer of assets from this plan | 2020-12-31 | $1,512,430,003 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2020-12-31 | $1,413,611,416 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2020-12-31 | $1,101,839,106 |
| Total income from all sources (including contributions) | 2020-12-31 | $72,821,177 |
| Total loss/gain on sale of assets | 2020-12-31 | $40,521,744 |
| Total of all expenses incurred | 2020-12-31 | $76,028 |
| Value of total assets at end of year | 2020-12-31 | $3,236,726,526 |
| Value of total assets at beginning of year | 2020-12-31 | $3,065,122,997 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2020-12-31 | $76,028 |
| Total interest from all sources | 2020-12-31 | $26,453,838 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2020-12-31 | No |
| Administrative expenses professional fees incurred | 2020-12-31 | $9,147 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2020-12-31 | $92,992,574 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2020-12-31 | $282,875,208 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2020-12-31 | $1,413,611,416 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2020-12-31 | $1,101,839,106 |
| Administrative expenses (other) incurred | 2020-12-31 | $2,858 |
| Total non interest bearing cash at end of year | 2020-12-31 | $0 |
| Total non interest bearing cash at beginning of year | 2020-12-31 | $6,874 |
| Value of net income/loss | 2020-12-31 | $72,745,149 |
| Value of net assets at end of year (total assets less liabilities) | 2020-12-31 | $1,823,115,110 |
| Value of net assets at beginning of year (total assets less liabilities) | 2020-12-31 | $1,963,283,891 |
| Investment advisory and management fees | 2020-12-31 | $64,023 |
| Interest earned on other investments | 2020-12-31 | $2,572,909 |
| Income. Interest from US Government securities | 2020-12-31 | $23,653,522 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2020-12-31 | $1,377,071,740 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2020-12-31 | $847,365,344 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2020-12-31 | $847,365,344 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2020-12-31 | $227,407 |
| Asset value of US Government securities at end of year | 2020-12-31 | $1,750,613,306 |
| Asset value of US Government securities at beginning of year | 2020-12-31 | $1,919,629,343 |
| Asset. Corporate debt instrument debt (other) at end of year | 2020-12-31 | $16,048,906 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2020-12-31 | $15,246,228 |
| Aggregate proceeds on sale of assets | 2020-12-31 | $4,288,147,714 |
| Aggregate carrying amount (costs) on sale of assets | 2020-12-31 | $4,247,625,970 |
| 2019 : 1-3 YEAR GOVERNMENT BOND INDEX FUND 2019 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2019-12-31 | $13,866,321 |
| Total unrealized appreciation/depreciation of assets | 2019-12-31 | $13,866,321 |
| Total transfer of assets to this plan | 2019-12-31 | $1,270,570,188 |
| Total transfer of assets from this plan | 2019-12-31 | $878,199,361 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2019-12-31 | $1,101,839,106 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2019-12-31 | $1,170,020,308 |
| Total income from all sources (including contributions) | 2019-12-31 | $48,470,826 |
| Total loss/gain on sale of assets | 2019-12-31 | $3,251,971 |
| Total of all expenses incurred | 2019-12-31 | $67,877 |
| Value of total assets at end of year | 2019-12-31 | $3,065,122,997 |
| Value of total assets at beginning of year | 2019-12-31 | $2,692,530,423 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2019-12-31 | $67,877 |
| Total interest from all sources | 2019-12-31 | $31,352,534 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2019-12-31 | No |
| Administrative expenses professional fees incurred | 2019-12-31 | $10,895 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2019-12-31 | $282,875,208 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2019-12-31 | $167,069,182 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2019-12-31 | $1,101,839,106 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2019-12-31 | $1,170,020,308 |
| Total non interest bearing cash at end of year | 2019-12-31 | $6,874 |
| Total non interest bearing cash at beginning of year | 2019-12-31 | $6,875 |
| Value of net income/loss | 2019-12-31 | $48,402,949 |
| Value of net assets at end of year (total assets less liabilities) | 2019-12-31 | $1,963,283,891 |
| Value of net assets at beginning of year (total assets less liabilities) | 2019-12-31 | $1,522,510,115 |
| Investment advisory and management fees | 2019-12-31 | $56,982 |
| Interest earned on other investments | 2019-12-31 | $1,107,212 |
| Income. Interest from US Government securities | 2019-12-31 | $30,122,345 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2019-12-31 | $847,365,344 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2019-12-31 | $1,010,587,246 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2019-12-31 | $1,010,587,246 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2019-12-31 | $122,977 |
| Asset value of US Government securities at end of year | 2019-12-31 | $1,919,629,343 |
| Asset value of US Government securities at beginning of year | 2019-12-31 | $1,512,879,754 |
| Asset. Corporate debt instrument debt (other) at end of year | 2019-12-31 | $15,246,228 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2019-12-31 | $1,987,366 |
| Aggregate proceeds on sale of assets | 2019-12-31 | $1,466,714,842 |
| Aggregate carrying amount (costs) on sale of assets | 2019-12-31 | $1,463,462,871 |
| 2018 : 1-3 YEAR GOVERNMENT BOND INDEX FUND 2018 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2018-12-31 | $6,543,028 |
| Total unrealized appreciation/depreciation of assets | 2018-12-31 | $6,543,028 |
| Total transfer of assets to this plan | 2018-12-31 | $515,052,326 |
| Total transfer of assets from this plan | 2018-12-31 | $450,879,266 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2018-12-31 | $1,170,020,308 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2018-12-31 | $1,192,558,102 |
| Total income from all sources (including contributions) | 2018-12-31 | $23,983,024 |
| Total loss/gain on sale of assets | 2018-12-31 | $-10,890,848 |
| Total of all expenses incurred | 2018-12-31 | $92,262 |
| Value of total assets at end of year | 2018-12-31 | $2,692,530,423 |
| Value of total assets at beginning of year | 2018-12-31 | $2,627,004,395 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2018-12-31 | $92,262 |
| Total interest from all sources | 2018-12-31 | $28,330,844 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2018-12-31 | No |
| Administrative expenses professional fees incurred | 2018-12-31 | $11,064 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2018-12-31 | $167,069,182 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2018-12-31 | $93,619,862 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2018-12-31 | $1,170,020,308 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2018-12-31 | $1,192,558,102 |
| Total non interest bearing cash at end of year | 2018-12-31 | $6,875 |
| Value of net income/loss | 2018-12-31 | $23,890,762 |
| Value of net assets at end of year (total assets less liabilities) | 2018-12-31 | $1,522,510,115 |
| Value of net assets at beginning of year (total assets less liabilities) | 2018-12-31 | $1,434,446,293 |
| Investment advisory and management fees | 2018-12-31 | $81,198 |
| Interest earned on other investments | 2018-12-31 | $1,700,654 |
| Income. Interest from US Government securities | 2018-12-31 | $26,553,917 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2018-12-31 | $1,010,587,246 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2018-12-31 | $1,103,620,256 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2018-12-31 | $1,103,620,256 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2018-12-31 | $76,273 |
| Asset value of US Government securities at end of year | 2018-12-31 | $1,512,879,754 |
| Asset value of US Government securities at beginning of year | 2018-12-31 | $1,429,764,277 |
| Asset. Corporate debt instrument debt (other) at end of year | 2018-12-31 | $1,987,366 |
| Aggregate proceeds on sale of assets | 2018-12-31 | $1,020,144,724 |
| Aggregate carrying amount (costs) on sale of assets | 2018-12-31 | $1,031,035,572 |
| 2017 : 1-3 YEAR GOVERNMENT BOND INDEX FUND 2017 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2017-12-31 | $-5,776,011 |
| Total unrealized appreciation/depreciation of assets | 2017-12-31 | $-5,776,011 |
| Total transfer of assets to this plan | 2017-12-31 | $520,929,113 |
| Total transfer of assets from this plan | 2017-12-31 | $456,526,590 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2017-12-31 | $1,192,558,102 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2017-12-31 | $1,032,539,539 |
| Total income from all sources (including contributions) | 2017-12-31 | $8,993,047 |
| Total loss/gain on sale of assets | 2017-12-31 | $-4,274,359 |
| Total of all expenses incurred | 2017-12-31 | $106,206 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2017-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2017-12-31 | $0 |
| Value of total assets at end of year | 2017-12-31 | $2,627,004,395 |
| Value of total assets at beginning of year | 2017-12-31 | $2,393,696,468 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2017-12-31 | $106,206 |
| Total interest from all sources | 2017-12-31 | $19,043,417 |
| Total dividends received (eg from common stock, registered investment company shares) | 2017-12-31 | $0 |
| Administrative expenses professional fees incurred | 2017-12-31 | $11,032 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2017-12-31 | $93,619,862 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2017-12-31 | $95,844,966 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2017-12-31 | $1,192,558,102 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2017-12-31 | $1,032,539,539 |
| Value of net income/loss | 2017-12-31 | $8,886,841 |
| Value of net assets at end of year (total assets less liabilities) | 2017-12-31 | $1,434,446,293 |
| Value of net assets at beginning of year (total assets less liabilities) | 2017-12-31 | $1,361,156,929 |
| Investment advisory and management fees | 2017-12-31 | $95,174 |
| Interest earned on other investments | 2017-12-31 | $2,170,151 |
| Income. Interest from US Government securities | 2017-12-31 | $16,820,352 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2017-12-31 | $1,103,620,256 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2017-12-31 | $955,716,929 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2017-12-31 | $955,716,929 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2017-12-31 | $52,914 |
| Asset value of US Government securities at end of year | 2017-12-31 | $1,429,764,277 |
| Asset value of US Government securities at beginning of year | 2017-12-31 | $1,342,134,573 |
| Aggregate proceeds on sale of assets | 2017-12-31 | $1,050,173,263 |
| Aggregate carrying amount (costs) on sale of assets | 2017-12-31 | $1,054,447,622 |
| 2016 : 1-3 YEAR GOVERNMENT BOND INDEX FUND 2016 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2016-12-31 | $-2,306,221 |
| Total unrealized appreciation/depreciation of assets | 2016-12-31 | $-2,306,221 |
| Total transfer of assets to this plan | 2016-12-31 | $795,113,623 |
| Total transfer of assets from this plan | 2016-12-31 | $419,890,637 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2016-12-31 | $1,032,539,539 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2016-12-31 | $772,733,102 |
| Total income from all sources (including contributions) | 2016-12-31 | $9,502,505 |
| Total loss/gain on sale of assets | 2016-12-31 | $1,194,690 |
| Total of all expenses incurred | 2016-12-31 | $91,335 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2016-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2016-12-31 | $0 |
| Value of total assets at end of year | 2016-12-31 | $2,393,696,468 |
| Value of total assets at beginning of year | 2016-12-31 | $1,749,255,875 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2016-12-31 | $91,335 |
| Total interest from all sources | 2016-12-31 | $10,614,036 |
| Total dividends received (eg from common stock, registered investment company shares) | 2016-12-31 | $0 |
| Administrative expenses professional fees incurred | 2016-12-31 | $11,240 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2016-12-31 | $95,844,966 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2016-12-31 | $62,778,974 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2016-12-31 | $1,032,539,539 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2016-12-31 | $772,733,102 |
| Value of net income/loss | 2016-12-31 | $9,411,170 |
| Value of net assets at end of year (total assets less liabilities) | 2016-12-31 | $1,361,156,929 |
| Value of net assets at beginning of year (total assets less liabilities) | 2016-12-31 | $976,522,773 |
| Investment advisory and management fees | 2016-12-31 | $80,095 |
| Interest earned on other investments | 2016-12-31 | $1,342,255 |
| Income. Interest from US Government securities | 2016-12-31 | $9,213,463 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2016-12-31 | $955,716,929 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2016-12-31 | $715,010,109 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2016-12-31 | $715,010,109 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2016-12-31 | $58,318 |
| Asset value of US Government securities at end of year | 2016-12-31 | $1,342,134,573 |
| Asset value of US Government securities at beginning of year | 2016-12-31 | $971,466,792 |
| Aggregate proceeds on sale of assets | 2016-12-31 | $836,198,862 |
| Aggregate carrying amount (costs) on sale of assets | 2016-12-31 | $835,004,172 |
| 2015 : 1-3 YEAR GOVERNMENT BOND INDEX FUND 2015 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2015-12-31 | $-3,662,565 |
| Total unrealized appreciation/depreciation of assets | 2015-12-31 | $-3,662,565 |
| Total transfer of assets to this plan | 2015-12-31 | $495,381,348 |
| Total transfer of assets from this plan | 2015-12-31 | $541,338,635 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2015-12-31 | $772,733,102 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2015-12-31 | $898,344,378 |
| Total income from all sources (including contributions) | 2015-12-31 | $6,443,843 |
| Total loss/gain on sale of assets | 2015-12-31 | $1,863,852 |
| Total of all expenses incurred | 2015-12-31 | $85,234 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2015-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2015-12-31 | $0 |
| Value of total assets at end of year | 2015-12-31 | $1,749,255,875 |
| Value of total assets at beginning of year | 2015-12-31 | $1,914,465,829 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2015-12-31 | $85,234 |
| Total interest from all sources | 2015-12-31 | $8,242,556 |
| Total dividends received (eg from common stock, registered investment company shares) | 2015-12-31 | $0 |
| Administrative expenses professional fees incurred | 2015-12-31 | $11,240 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2015-12-31 | $62,778,974 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2015-12-31 | $53,374,828 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2015-12-31 | $772,733,102 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2015-12-31 | $898,344,378 |
| Value of net income/loss | 2015-12-31 | $6,358,609 |
| Value of net assets at end of year (total assets less liabilities) | 2015-12-31 | $976,522,773 |
| Value of net assets at beginning of year (total assets less liabilities) | 2015-12-31 | $1,016,121,451 |
| Investment advisory and management fees | 2015-12-31 | $73,994 |
| Interest earned on other investments | 2015-12-31 | $994,798 |
| Income. Interest from US Government securities | 2015-12-31 | $7,247,758 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2015-12-31 | $715,010,109 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2015-12-31 | $846,572,948 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2015-12-31 | $846,572,948 |
| Asset value of US Government securities at end of year | 2015-12-31 | $971,466,792 |
| Asset value of US Government securities at beginning of year | 2015-12-31 | $1,014,518,053 |
| Aggregate proceeds on sale of assets | 2015-12-31 | $953,998,788 |
| Aggregate carrying amount (costs) on sale of assets | 2015-12-31 | $952,134,936 |
| 2014 : 1-3 YEAR GOVERNMENT BOND INDEX FUND 2014 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2014-12-31 | $-471,920 |
| Total unrealized appreciation/depreciation of assets | 2014-12-31 | $-471,920 |
| Total transfer of assets to this plan | 2014-12-31 | $449,094,633 |
| Total transfer of assets from this plan | 2014-12-31 | $468,874,978 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2014-12-31 | $898,344,378 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2014-12-31 | $1,146,410,554 |
| Total income from all sources (including contributions) | 2014-12-31 | $7,962,889 |
| Total loss/gain on sale of assets | 2014-12-31 | $1,563,877 |
| Total of all expenses incurred | 2014-12-31 | $86,880 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2014-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2014-12-31 | $0 |
| Value of total assets at end of year | 2014-12-31 | $1,914,465,829 |
| Value of total assets at beginning of year | 2014-12-31 | $2,174,436,341 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2014-12-31 | $86,880 |
| Total interest from all sources | 2014-12-31 | $6,870,932 |
| Total dividends received (eg from common stock, registered investment company shares) | 2014-12-31 | $0 |
| Administrative expenses professional fees incurred | 2014-12-31 | $11,080 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2014-12-31 | $53,374,828 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2014-12-31 | $120,268,378 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2014-12-31 | $898,344,378 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2014-12-31 | $1,146,410,554 |
| Value of net income/loss | 2014-12-31 | $7,876,009 |
| Value of net assets at end of year (total assets less liabilities) | 2014-12-31 | $1,016,121,451 |
| Value of net assets at beginning of year (total assets less liabilities) | 2014-12-31 | $1,028,025,787 |
| Investment advisory and management fees | 2014-12-31 | $75,800 |
| Interest earned on other investments | 2014-12-31 | $1,253,775 |
| Income. Interest from US Government securities | 2014-12-31 | $5,617,157 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2014-12-31 | $846,572,948 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2014-12-31 | $1,026,343,498 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2014-12-31 | $1,026,343,498 |
| Asset value of US Government securities at end of year | 2014-12-31 | $1,014,518,053 |
| Asset value of US Government securities at beginning of year | 2014-12-31 | $1,027,824,465 |
| Aggregate proceeds on sale of assets | 2014-12-31 | $1,140,958,293 |
| Aggregate carrying amount (costs) on sale of assets | 2014-12-31 | $1,139,394,416 |
| 2013 : 1-3 YEAR GOVERNMENT BOND INDEX FUND 2013 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2013-12-31 | $-1,074,025 |
| Total unrealized appreciation/depreciation of assets | 2013-12-31 | $-1,074,025 |
| Total transfer of assets to this plan | 2013-12-31 | $759,921,227 |
| Total transfer of assets from this plan | 2013-12-31 | $334,354,455 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2013-12-31 | $1,146,410,554 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2013-12-31 | $257,086,936 |
| Total income from all sources (including contributions) | 2013-12-31 | $4,905,566 |
| Total loss/gain on sale of assets | 2013-12-31 | $1,354,519 |
| Total of all expenses incurred | 2013-12-31 | $83,112 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2013-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2013-12-31 | $0 |
| Value of total assets at end of year | 2013-12-31 | $2,174,436,341 |
| Value of total assets at beginning of year | 2013-12-31 | $854,723,497 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2013-12-31 | $83,112 |
| Total interest from all sources | 2013-12-31 | $4,625,072 |
| Total dividends received (eg from common stock, registered investment company shares) | 2013-12-31 | $0 |
| Administrative expenses professional fees incurred | 2013-12-31 | $11,700 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2013-12-31 | $120,268,378 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2013-12-31 | $31,903,898 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2013-12-31 | $1,146,410,554 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2013-12-31 | $257,086,936 |
| Value of net income/loss | 2013-12-31 | $4,822,454 |
| Value of net assets at end of year (total assets less liabilities) | 2013-12-31 | $1,028,025,787 |
| Value of net assets at beginning of year (total assets less liabilities) | 2013-12-31 | $597,636,561 |
| Investment advisory and management fees | 2013-12-31 | $71,412 |
| Interest earned on other investments | 2013-12-31 | $957,351 |
| Income. Interest from US Government securities | 2013-12-31 | $3,667,721 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2013-12-31 | $1,026,343,498 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2013-12-31 | $234,337,564 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2013-12-31 | $234,337,564 |
| Asset value of US Government securities at end of year | 2013-12-31 | $1,027,824,465 |
| Asset value of US Government securities at beginning of year | 2013-12-31 | $588,482,035 |
| Aggregate proceeds on sale of assets | 2013-12-31 | $937,655,326 |
| Aggregate carrying amount (costs) on sale of assets | 2013-12-31 | $936,300,807 |
| 2012 : 1-3 YEAR GOVERNMENT BOND INDEX FUND 2012 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2012-12-31 | $-1,306,373 |
| Total unrealized appreciation/depreciation of assets | 2012-12-31 | $-1,306,373 |
| Total transfer of assets to this plan | 2012-12-31 | $327,050,300 |
| Total transfer of assets from this plan | 2012-12-31 | $253,007,100 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2012-12-31 | $257,086,936 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2012-12-31 | $317,418,197 |
| Total income from all sources (including contributions) | 2012-12-31 | $3,881,294 |
| Total loss/gain on sale of assets | 2012-12-31 | $1,442,199 |
| Total of all expenses incurred | 2012-12-31 | $78,678 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2012-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2012-12-31 | $0 |
| Value of total assets at end of year | 2012-12-31 | $854,723,497 |
| Value of total assets at beginning of year | 2012-12-31 | $837,208,942 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2012-12-31 | $78,678 |
| Total interest from all sources | 2012-12-31 | $3,745,468 |
| Total dividends received (eg from common stock, registered investment company shares) | 2012-12-31 | $0 |
| Administrative expenses professional fees incurred | 2012-12-31 | $11,000 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2012-12-31 | $31,903,898 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2012-12-31 | $52,985,935 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2012-12-31 | $257,086,936 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2012-12-31 | $317,418,197 |
| Value of net income/loss | 2012-12-31 | $3,802,616 |
| Value of net assets at end of year (total assets less liabilities) | 2012-12-31 | $597,636,561 |
| Value of net assets at beginning of year (total assets less liabilities) | 2012-12-31 | $519,790,745 |
| Investment advisory and management fees | 2012-12-31 | $67,678 |
| Interest earned on other investments | 2012-12-31 | $507,198 |
| Income. Interest from US Government securities | 2012-12-31 | $3,238,270 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2012-12-31 | $234,337,564 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2012-12-31 | $268,257,992 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2012-12-31 | $268,257,992 |
| Asset value of US Government securities at end of year | 2012-12-31 | $588,482,035 |
| Asset value of US Government securities at beginning of year | 2012-12-31 | $515,965,015 |
| Aggregate proceeds on sale of assets | 2012-12-31 | $432,298,365 |
| Aggregate carrying amount (costs) on sale of assets | 2012-12-31 | $430,856,166 |
| 2011 : 1-3 YEAR GOVERNMENT BOND INDEX FUND 2011 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2011-12-31 | $-939,730 |
| Total unrealized appreciation/depreciation of assets | 2011-12-31 | $-939,730 |
| Total transfer of assets to this plan | 2011-12-31 | $1,061,233,088 |
| Total transfer of assets from this plan | 2011-12-31 | $1,013,359,745 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2011-12-31 | $317,418,197 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2011-12-31 | $191,772,007 |
| Total income from all sources (including contributions) | 2011-12-31 | $13,533,696 |
| Total loss/gain on sale of assets | 2011-12-31 | $8,504,511 |
| Total of all expenses incurred | 2011-12-31 | $82,442 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2011-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2011-12-31 | $0 |
| Value of total assets at end of year | 2011-12-31 | $837,208,942 |
| Value of total assets at beginning of year | 2011-12-31 | $650,238,155 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2011-12-31 | $82,442 |
| Total interest from all sources | 2011-12-31 | $5,968,915 |
| Total dividends received (eg from common stock, registered investment company shares) | 2011-12-31 | $0 |
| Administrative expenses professional fees incurred | 2011-12-31 | $12,975 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2011-12-31 | $52,985,935 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2011-12-31 | $1,715,041 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2011-12-31 | $317,418,197 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2011-12-31 | $191,772,007 |
| Value of net income/loss | 2011-12-31 | $13,451,254 |
| Value of net assets at end of year (total assets less liabilities) | 2011-12-31 | $519,790,745 |
| Value of net assets at beginning of year (total assets less liabilities) | 2011-12-31 | $458,466,148 |
| Investment advisory and management fees | 2011-12-31 | $69,467 |
| Interest earned on other investments | 2011-12-31 | $473,492 |
| Income. Interest from US Government securities | 2011-12-31 | $5,495,423 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2011-12-31 | $268,257,992 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2011-12-31 | $192,917,600 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2011-12-31 | $192,917,600 |
| Asset value of US Government securities at end of year | 2011-12-31 | $515,965,015 |
| Asset value of US Government securities at beginning of year | 2011-12-31 | $455,605,514 |
| Aggregate proceeds on sale of assets | 2011-12-31 | $1,391,914,690 |
| Aggregate carrying amount (costs) on sale of assets | 2011-12-31 | $1,383,410,179 |
| 2010 : 1-3 YEAR GOVERNMENT BOND INDEX FUND 2010 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2010-12-31 | $1,981,760 |
| Total unrealized appreciation/depreciation of assets | 2010-12-31 | $1,981,760 |
| Total transfer of assets to this plan | 2010-12-31 | $106,866,345 |
| Total transfer of assets from this plan | 2010-12-31 | $238,449,382 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2010-12-31 | $191,772,007 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2010-12-31 | $337,806,170 |
| Total income from all sources (including contributions) | 2010-12-31 | $12,856,668 |
| Total loss/gain on sale of assets | 2010-12-31 | $3,955,342 |
| Total of all expenses incurred | 2010-12-31 | $75,439 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2010-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2010-12-31 | $0 |
| Value of total assets at end of year | 2010-12-31 | $650,238,155 |
| Value of total assets at beginning of year | 2010-12-31 | $915,074,126 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2010-12-31 | $75,439 |
| Total interest from all sources | 2010-12-31 | $6,919,566 |
| Total dividends received (eg from common stock, registered investment company shares) | 2010-12-31 | $0 |
| Administrative expenses professional fees incurred | 2010-12-31 | $12,975 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2010-12-31 | $1,715,041 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2010-12-31 | $126,584,169 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2010-12-31 | $191,772,007 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2010-12-31 | $337,806,170 |
| Value of net income/loss | 2010-12-31 | $12,781,229 |
| Value of net assets at end of year (total assets less liabilities) | 2010-12-31 | $458,466,148 |
| Value of net assets at beginning of year (total assets less liabilities) | 2010-12-31 | $577,267,956 |
| Investment advisory and management fees | 2010-12-31 | $62,464 |
| Interest earned on other investments | 2010-12-31 | $238,877 |
| Income. Interest from US Government securities | 2010-12-31 | $6,662,804 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2010-12-31 | $192,917,600 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2010-12-31 | $223,714,400 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2010-12-31 | $223,714,400 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2010-12-31 | $17,885 |
| Asset value of US Government securities at end of year | 2010-12-31 | $455,605,514 |
| Asset value of US Government securities at beginning of year | 2010-12-31 | $564,775,557 |
| Aggregate proceeds on sale of assets | 2010-12-31 | $498,310,727 |
| Aggregate carrying amount (costs) on sale of assets | 2010-12-31 | $494,355,385 |
