Undiscounted amount, after reinsurance, of incurred-but-not-reported (IBNR) liabilities plus expected development on reported claims, for claims and allocated claim adjustment expense for short-duration insurance contracts. Excludes unallocated claim adjustment expense.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 55
-Paragraph 9E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480046/944-40-55-9E

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 4E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-4E

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 4D
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-4D

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- Definition

Undiscounted amount, after reinsurance, of incurred claims and allocated claim adjustment expense used in claims development for short-duration insurance contracts. Excludes unallocated claim adjustment expense.

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Cumulative number of reported claims for short-duration insurance contracts.

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Reinsurance and Policy Benefits and Losses, Claims, and Loss Expenses Payable (Incurred Claims Development) (Details) $ in Thousands	Mar. 31, 2025 USD ($) Claims	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 21,926
Accident Year 2018 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 16,885	$ 16,856	$ 16,819	$ 17,157	$ 18,027	$ 18,386	$ 19,580
Shortduration Insurance Contracts Number Of Reported Claims \| Claims	12,221
Accident Year 2019 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 25,766	27,793	27,831	27,316	26,316	$ 22,138
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 481
Shortduration Insurance Contracts Number Of Reported Claims \| Claims	12,042
Accident Year 2020 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 14,005	14,561	17,107	17,485	$ 20,671
Shortduration Insurance Contracts Number Of Reported Claims \| Claims	11,556
Accident Year 2021 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 22,404	24,484	25,337	$ 28,982
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 2,000
Shortduration Insurance Contracts Number Of Reported Claims \| Claims	14,200
Accident Year 2022 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 27,698	28,436	$ 27,570
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 3,540
Shortduration Insurance Contracts Number Of Reported Claims \| Claims	13,176
Accident Year 2023 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 25,611	$ 25,396
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 5,912
Shortduration Insurance Contracts Number Of Reported Claims \| Claims	14,073
Accident Year 2024 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 30,293
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 9,993
Shortduration Insurance Contracts Number Of Reported Claims \| Claims	12,816