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Investments (Table Text Block) | 9 Months Ended | 12 Months Ended
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Dec. 31, 2022 | Mar. 31, 2022
Investments Debt Equity Securities [Abstract] |  |
Available-for-Sale Investments | Amortized Gross Gross Gross Allowance for Expected Credit Losses Estimated (Unaudited) (In thousands) U.S. treasury securities and government obligations $ 353,331 $ 582 $ (3,844) $ (7,761) $ – $ 342,308 U.S. government agency mortgage-backed securities 34,920 58 (6,263) (602) – 28,113 Obligations of states and political subdivisions 164,547 503 (3,458) (10,609) – 150,983 Corporate securities 2,060,503 790 (39,556) (210,257) (2,243) 1,809,237 Mortgage-backed securities 375,819 30 – (42,962) – 332,887 $ 2,989,120 $ 1,963 $ ( 53,121 )$ ( 272,191 )$ ( 2,243 )$ 2,663,528 | Amortized Gross Gross Gross Allowance for Expected Credit Losses Estimated (In thousands) U.S. treasury securities and government obligations $ 128,078 $ 7,984 $ – $ (969) $ – $ 135,093 U.S. government agency mortgage-backed securities 44,678 280 (42) (3,111) – 41,805 Obligations of states and political subdivisions 178,040 15,450 – (508) – 192,982 Corporate securities 1,989,212 138,909 (402) (6,604) (60) 2,121,055 Mortgage-backed securities 324,029 7,671 (1) (1,542) – 330,157 $ 2,664,037 $ 170,294 $ ( 445 )$ ( 12,734 )$ ( 60 )$ 2,821,092
Adjusted Cost and Estimated Market Value of Available-for-sale Investments | December 31, 2022 March 31, 2022 Amortized Estimated Amortized Estimated (Unaudited) (In thousands) Due in one year or less $ 333,984 $ 333,803 $ 97,969 $ 99,432 Due after one year through five years 602,861 575,794 541,840 570,135 Due after five years through ten years 756,691 674,055 704,295 765,073 Due after ten years 919,765 746,989 995,904 1,056,295 2,613,301 2,330,641 2,340,008 2,490,935 Mortgage-backed securities 375,819 332,887 324,029 330,157 $ 2,989,120 $ 2,663,528 $ 2,664,037 $ 2,821,092 |
Available for sale equity investments | December 31, 2022 March 31, 2022 Amortized Estimated Amortized Estimated (Unaudited) (In thousands) Common stocks $ 29,686 $ 37,619 $ 27,674 $ 46,212 Non-redeemable preferred stocks 26,054 22,054 26,054 26,095 $ 55,740 $ 59,673 $ 53,728 $ 72,307 |
Carrying value of Investments, other | December 31, March 31, 2022 2022 (Unaudited) (In thousands) Mortgage loans, net $ 414,886 $ 423,163 Short-term investments 13,306 30,916 Real estate 71,707 67,824 Policy loans 10,680 10,309 Other equity investments 7,876 11,543 $ 518,455 $ 543,755 |

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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 transactions that are recognized separately from the acquisition of assets and assumptions of liabilities in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + 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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- 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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