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Investments (Table Text Block) | 12 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Investments, Debt and Equity Securities [Abstract] |  |
Available-for-Sale Investments | Amortized Cost Gross Unrealized Gains Gross Unrealized Losses More than 12 Months Gross Unrealized Losses Less than 12 Months Estimated Market Value (In thousands) U.S. treasury securities and government obligations $ 112,421 $ 7,959 $ (1) $ – $ 120,379 U.S. government agency mortgage-backed securities 88,449 759 (1) (373) 88,834 Obligations of states and political subdivisions 287,643 20,664 (155) – 308,152 Corporate securities 1,656,425 100,302 (919) (812) 1,754,996 Mortgage-backed securities 187,784 6,011 (1) (107) 193,687 Redeemable preferred stocks 1,493 72 – – 1,565 $ 2,334,215 $ 135,767 $ (1,077) $ (1,292) $ 2,467,613 | Amortized Cost Gross Unrealized Gains Gross Unrealized Losses More than 12 Months Gross Unrealized Losses Less than 12 Months Estimated Market Value (In thousands) U.S. treasury securities and government obligations $ 136,010 $ 2,409 $ (2,104) $ (447) $ 135,868 U.S. government agency mortgage-backed securities 31,101 433 (146) (19) 31,369 Obligations of states and political subdivisions 298,955 8,079 (233) (905) 305,896 Corporate securities 1,613,199 14,777 (14,257) (24,986) 1,588,733 Mortgage-backed securities 148,203 880 (285) (903) 147,895 Redeemable preferred stocks 1,493 20 – (45) 1,468 $ 2,228,961 $ 26,598 $ (17,025) $ (27,305) $ 2,211,229
Adjusted Cost and Estimated Market Value of Available-for-sale Investments | March 31, 2020 March 31, 2019 Amortized Cost Estimated Market Value Amortized Cost Estimated Market Value (In thousands) Due in one year or less $ 128,747 $ 129,420 $ 71,987 $ 71,954 Due after one year through five years 547,821 566,934 541,195 540,658 Due after five years through ten years 636,036 678,636 621,031 614,485 Due after ten years 832,334 897,371 845,052 834,769 2,144,938 2,272,361 2,079,265 2,061,866 Mortgage backed securities 187,784 193,687 148,203 147,895 Redeemable preferred stocks 1,493 1,565 1,493 1,468 $ 2,334,215 $ 2,467,613 $ 2,228,961 $ 2,211,229 |
Available for sale equity investments | March 31, 2020 March 31, 2019 Amortized Cost Estimated Market Value Amortized Cost Estimated Market Value (In thousands) Common stocks $ 9,775 $ 20,015 $ 10,123 $ 17,379 Non-redeemable preferred stocks 5,076 5,110 7,451 6,789 $ 14,851 $ 25,125 $ 17,574 $ 24,168 |
Carrying Value of Other Investments | March 31, 2020 2019 (In thousands) Mortgage loans, net $ 262,688 $ 225,829 Short-term investments 6,995 5,546 Real estate 69,569 53,519 Policy loans 11,212 10,491 Other equity investments 9,909 5,351 $ 360,373 $ 300,736 |

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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References No definition available. + Details
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- Definition Tabular disclosure of the investment holdings which are represented by other than securities (for example, commodities). The investment holdings, other than securities investments table lists the long positions of non-security investments held by entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 5 -Subparagraph (SX 210.12-13) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611282-123010 + Details
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- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References No definition available. + Details
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