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, Surety (Details) - Surety [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	$ 14,839
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	12,753
All outstanding liabilities before 2016, net of reinsurance	47
Liabilities for losses, claims and loss adjustment expenses, net of reinsurance	2,133
Accident Year 2016 [Member]
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	1,654	$ 1,660	$ 1,666	$ 1,670	$ 1,678	$ 1,865	$ 1,876	$ 1,865	$ 1,812	$ 3,314
IBNR Reserves	$ 0
Cumulative number of reported claims (in Claim) \| Claim	50
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	$ 1,654	1,660	1,666	1,670	1,677	1,862	1,873	1,772	1,732	$ 1,054
Accident Year 2017 [Member]
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	3,398	3,403	3,448	3,440	3,514	3,629	3,799	3,671	4,677
IBNR Reserves	$ 2
Cumulative number of reported claims (in Claim) \| Claim	47
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	$ 3,388	3,394	3,400	3,402	3,442	3,545	3,523	3,255	$ 1,971
Accident Year 2018 [Member]
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	748	750	750	767	956	1,381	1,938	3,528
IBNR Reserves	$ 0
Cumulative number of reported claims (in Claim) \| Claim	67
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	$ 748	748	749	760	941	1,361	1,454	$ 1,157
Accident Year 2019 [Member]
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	424	439	507	513	630	657	2,130
IBNR Reserves	$ 0
Cumulative number of reported claims (in Claim) \| Claim	64
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	$ 424	439	444	446	568	395	$ 259
Accident Year 2020 [Member]
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	400	402	460	465	574	2,263
IBNR Reserves	$ 0
Cumulative number of reported claims (in Claim) \| Claim	32
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	$ 400	400	459	464	460	$ 97
Accident Year 2021 [Member]
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	1,524	1,475	1,497	1,455	2,936
IBNR Reserves	$ 7
Cumulative number of reported claims (in Claim) \| Claim	23
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	$ 1,475	1,475	1,496	803	$ 156
Accident Year 2022 [Member]
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	2,265	2,296	2,339	3,202
IBNR Reserves	$ 19
Cumulative number of reported claims (in Claim) \| Claim	36
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	$ 2,153	2,180	2,191	$ 970
Accident Year 2023 [Member]
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	1,581	1,627	2,634
IBNR Reserves	$ 4
Cumulative number of reported claims (in Claim) \| Claim	51
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	$ 1,565	1,602	$ 98
Accident Year 2024 [Member]
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	1,074	2,324
IBNR Reserves	$ 159
Cumulative number of reported claims (in Claim) \| Claim	122
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	$ 735	$ 392
Accident Year 2025 [Member]
Other Insurance Reserves and Policyholder Funds [Abstract]
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance	1,771
IBNR Reserves	$ 1,413
Cumulative number of reported claims (in Claim) \| Claim	33
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance	$ 211