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Allowance for Credit Losses (Reserve Allowance Various Credit Loss) (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 | Mar. 31, 2022
Valuation And Qualifying Accounts [Abstract] |  |
March 31, 2022 | $ 9,210 | $ 6,242
Transition adjustment expected credit loss current | (2,442) | 2,968
Write-offs against allowance | 0 | 0
Recoveries | 0 | 0
December 31, 2022 | 6,768 | 9,210
Trade Receivables |  |
Valuation And Qualifying Accounts [Abstract] |  |
March 31, 2022 | 8,649 | 4,421
Transition adjustment expected credit loss current | (4,630) | 4,228
Write-offs against allowance | 0 | 0
Recoveries | 0 | 0
December 31, 2022 | 4,019 | 8,649
Investments, Fixed Maturities |  |
Valuation And Qualifying Accounts [Abstract] |  |
March 31, 2022 | 60 | 1,320
Transition adjustment expected credit loss current | 2,183 | (1,260)
Write-offs against allowance | 0 | 0
Recoveries | 0 | 0
December 31, 2022 | 2,243 | 60
Investments, Other |  |
Valuation And Qualifying Accounts [Abstract] |  |
March 31, 2022 | 501 | 501
Transition adjustment expected credit loss current | 5 | 0
Write-offs against allowance | 0 | 0
Recoveries | 0 | 0
December 31, 2022 | $ 506 | $ 501

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- Definition Amount of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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