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Reinsurance And Policy Benefits And Losses Claims And Loss Expenses Payable (Cumulative Paid Claims And Allocated Claim Adjustment Expense Net Of Reinsurance) (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2018
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Incurred claims development [Abstract] |  |  |  |  |  |  |
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net | $ 115,430 |  |  |  |  |  |
All outstanding liabilities before 2012, net of reinsurance | 57,647 |  |  |  |  |  |
Liabilities for claims and claim adjustment expenses, net of reinsurance | 95,004 |  |  |  |  |  |
Accident Year 2017 [Member] |  |  |  |  |  |  |
Incurred claims development [Abstract] |  |  |  |  |  |  |
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net | 15,260 | $ 15,264 | $ 15,263 | $ 15,012 | $ 14,825 | $ 11,638 | $ 8,970
Accident Year 2018 [Member] |  |  |  |  |  |  |
Incurred claims development [Abstract] |  |  |  |  |  |  |
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net | 16,851 | 16,809 | 16,766 | 15,150 | 12,689 | $ 8,838 |
Accident Year 2019 [Member] |  |  |  |  |  |  |
Incurred claims development [Abstract] |  |  |  |  |  |  |
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net | 25,122 | 21,598 | 19,215 | 14,737 | $ 7,366 |  |
Accident Year 2020 [Member] |  |  |  |  |  |  |
Incurred claims development [Abstract] |  |  |  |  |  |  |
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net | 13,510 | 12,521 | 11,114 | $ 7,665 |  |  |
Accident Year 2021 [Member] |  |  |  |  |  |  |
Incurred claims development [Abstract] |  |  |  |  |  |  |
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net | 16,829 | 14,831 | $ 11,040 |  |  |  |
Accident Year 2022 [Member] |  |  |  |  |  |  |
Incurred claims development [Abstract] |  |  |  |  |  |  |
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net | 18,444 | $ 10,572 |  |  |  |  |
Accident Year 2023 [Member] |  |  |  |  |  |  |
Incurred claims development [Abstract] |  |  |  |  |  |  |
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net | $ 9,414 |  |  |  |  |  |

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- Definition Amount, after reinsurance, of paid claims and allocated claim adjustment expense used in claims development for short-duration insurance contracts. Excludes unallocated claim adjustment expense. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 4B -Subparagraph (b) -SubTopic 40 -Topic 944 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-4B + Details
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- Definition Undiscounted amount, after reinsurance, of the liability for unpaid claims and allocated claim adjustment expense for short-duration insurance contracts. Excludes unallocated claim adjustment expense. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 4B -SubTopic 40 -Topic 944 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-4B Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 4C -SubTopic 40 -Topic 944 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-4C + Details
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- Definition Undiscounted amount, after reinsurance, of the liability for unpaid claims and allocated claim adjustment expense for short-duration insurance contracts for accident years not separately presented in claim development information. Excludes unallocated claim adjustment expense. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 4B -SubTopic 40 -Topic 944 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-4B + Details
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