Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash Flows From Operating Activities
Net income (loss)	$ 61,957	$ (29,700)	$ 15,031
Adjustments to reconcile net income to net cash provided by operating activities
Net accretion of bond premium	4,531	7,092	9,000
Depreciation and amortization	10,904	10,508	7,670
Stock-based compensation expense	5,517	3,246	2,826
Net investment (gains) losses	5,901	(1,547)	15,622
Net cash flows from trading investments	56,381	116,080	29,725
Deferred income tax benefit	(8,391)	(8,308)	(3,930)
Changes in:
Accrued investment income	139	(1,454)	(1,084)
Premiums receivable	13,990	(99,062)	(48,958)
Deferred policy acquisition costs	(20,692)	(22,307)	(12,779)
Reinsurance receivables	(7,559)	(52,316)	(43,138)
Prepaid reinsurance premiums	(17,210)	(16,382)	(1,972)
Income taxes receivable	7,282	9,955	960
Other assets	(2,277)	(34,403)	(8,136)
Losses, claims and loss settlement expenses	158,027	141,481	(16,991)
Unearned premiums	72,064	74,996	34,655
Accrued expenses and other liabilities	1,432	70,956	12,972
Deferred income taxes	(1)	0	(652)
Other, net	(1,691)	2,901	7,928
Net cash provided by (used in) operating activities	340,304	171,736	(1,251)
Cash Flows From Investing Activities
Proceeds from sale of available-for-sale investments	491,771	77,388	83,559
Proceeds from call and maturity of available-for-sale investments	178,805	80,081	184,210
Proceeds from short-term and other investments	9,381	4,615	12,648
Purchase of available-for-sale investments	(872,850)	(273,081)	(284,054)
Purchase of mortgage loans	0	(8,137)	(103)
Purchase of short-term and other investments	(87,724)	(19,866)	(13,294)
Net purchases and sales of property and equipment	(11,870)	(10,886)	(2,137)
Net cash provided by (used in) investing activities	(292,487)	(149,886)	(19,171)
Cash Flows From Financing Activities
Debt note issuance	70,000	0	0
Debt note issuance costs	(3,050)	0	0
Payment of cash dividends	(16,212)	(16,164)	(15,860)
Issuance of common stock	348	(290)	828
Net cash provided by (used in) financing activities	51,086	(16,454)	(15,032)
Net Change in Cash and Cash Equivalents	98,903	5,396	(35,454)
Cash and Cash Equivalents at Beginning of Year	102,046	96,650	132,104
Cash and Cash Equivalents at End of Year	200,949	102,046	96,650
Supplemental Cash Flow Information [Abstract]
Income taxes paid	16,112	1,348	21,548
Interest paid	$ 7,172	$ 3,260	$ 3,188