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Long-Term Debt - Interest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Non-cash expense	$ 708	$ 703	$ 56
Total	6,531	6,609	638
Surplus note
Debt Instrument [Line Items]
Total	198	172	113
Unsecured Debt | 5.625% Senior Unsecured Notes Due 2026
Debt Instrument [Line Items]
Total	$ 5,625	$ 5,734	$ 469
Stated percentage	5.625%

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Amount of amortization expense attributable to debt issuance costs.

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