XML 38 R26.htm IDEA: XBRL DOCUMENT
v3.20.2

Investments (Table Text Block) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2020 | Mar. 31, 2020
Investments Debt 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 Allowance for Expected Credit Losses Estimated Market Value (Unaudited) (In thousands) U.S. treasury securities and government obligations $ 84,814 $ 12,192 $ - $ - $ - $ 97,006 U.S. government agency mortgage-backed securities 126,599 3,458 (1) (39) - 130,017 Obligations of states and political subdivisions 270,476 21,364 (141) (2) - 291,697 Corporate securities 1,636,025 66,359 (1,759) (37,168) (5,407) 1,658,050 Mortgage-backed securities 197,599 2,485 (2) (6,031) - 194,051 Redeemable preferred stocks 1,493 14 - (5) - 1,502 $ 2,317,006 $ 105,872 $ (1,903) $ (43,245) $ (5,407) $ 2,372,323 | 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
Adjusted Cost and Estimated Market Value of Available-for-sale Investments | June 30, 2020 March 31, 2020 Amortized Cost Estimated Market Value Amortized Cost Estimated Market Value (Unaudited) (In thousands) Due in one year or less $ 141,789 $ 141,448 $ 128,747 $ 129,420 Due after one year through five years 537,400 541,406 547,821 566,934 Due after five years through ten years 605,305 618,209 636,036 678,636 Due after ten years 833,420 875,707 832,334 897,371 2,117,914 2,176,770 2,144,938 2,272,361 Mortgage-backed securities 197,599 194,051 187,784 193,687 Redeemable preferred stocks 1,493 1,502 1,493 1,565 $ 2,317,006 $ 2,372,323 $ 2,334,215 $ 2,467,613 |
Available for sale equity investments | June 30, 2020 March 31, 2020 Amortized Cost Estimated Market Value Amortized Cost Estimated Market Value (Unaudited) (In thousands) Common stocks $ 9,775 $ 16,595 $ 9,775 $ 20,015 Non-redeemable preferred stocks 5,076 4,604 5,076 5,110 $ 14,851 $ 21,199 $ 14,851 $ 25,125 |

X
- 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
Name: | us-gaap_AvailableForSaleSecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_TradingSecuritiesAndCertainTradingAssetsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration