Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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.

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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.

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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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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.

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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.

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

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Other Insurance Reserves and Policyholder Funds - Information About Incurred and Paid Claims Development, Automobile Liability (Details) - Automobile Liability [Member] $ in Thousands	Dec. 31, 2025 USD ($) Claim	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	$ 303,352
All outstanding liabilities prior period net of reinsurance	240,148
Liabilities for losses, claims and loss adjustment expenses, net of reinsurance	63,204
Accident Year 2016 [Member]
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	$ 22,448	$ 22,448	$ 22,448	$ 22,448	$ 22,310	$ 22,245	$ 22,388	$ 21,846	$ 21,275	$ 20,549
Cumulative number of reported claims (in Claim) \| Claim	3,863
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	$ 22,448	22,448	22,448	22,448	21,809	21,408	19,613	16,397	13,141	$ 6,796
Accident Year 2017 [Member]
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	26,255	26,254	26,231	26,153	26,009	25,180	23,766	24,212	22,179
IBNR Reserves	$ 1
Cumulative number of reported claims (in Claim) \| Claim	3,813
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	$ 26,249	26,249	26,222	25,712	25,023	22,778	20,221	16,317	$ 7,401
Accident Year 2018 [Member]
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	31,154	31,170	31,135	30,464	30,013	27,338	25,682	24,284
IBNR Reserves	$ 16
Cumulative number of reported claims (in Claim) \| Claim	3,651
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	$ 31,057	30,507	29,201	27,671	24,662	21,121	15,647	$ 6,989
Accident Year 2019 [Member]
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	29,384	29,216	28,513	28,042	25,724	24,045	25,241
IBNR Reserves	$ 59
Cumulative number of reported claims (in Claim) \| Claim	3,608
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	$ 29,025	28,778	26,126	22,868	19,384	14,694	$ 7,305
Accident Year 2020 [Member]
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	21,066	21,459	21,164	20,137	16,442	22,416
IBNR Reserves	$ 84
Cumulative number of reported claims (in Claim) \| Claim	2,523
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	$ 20,553	20,466	18,133	14,693	9,941	$ 5,172
Accident Year 2021 [Member]
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	26,866	27,041	24,957	21,172	25,887
IBNR Reserves	$ 215
Cumulative number of reported claims (in Claim) \| Claim	2,794
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	$ 25,552	24,798	19,230	13,918	$ 6,242
Accident Year 2022 [Member]
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	33,348	31,633	27,293	28,860
IBNR Reserves	$ 1,379
Cumulative number of reported claims (in Claim) \| Claim	2,933
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	$ 29,123	24,137	18,010	$ 7,023
Accident Year 2023 [Member]
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	39,468	33,626	33,266
IBNR Reserves	$ 3,408
Cumulative number of reported claims (in Claim) \| Claim	2,986
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	$ 29,019	22,232	$ 9,068
Accident Year 2024 [Member]
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	31,049	34,105
IBNR Reserves	$ 3,955
Cumulative number of reported claims (in Claim) \| Claim	2,808
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	$ 18,929	$ 8,939
Accident Year 2025 [Member]
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	42,314
IBNR Reserves	$ 22,340
Cumulative number of reported claims (in Claim) \| Claim	2,371
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	$ 8,193