Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash Flows From Operating Activities
Net income (loss)	$ 15,031	$ 80,594	$ (112,706)
Adjustments to reconcile net income to net cash provided by operating activities
Net accretion of bond premium	9,000	13,597	10,444
Depreciation and amortization	7,670	6,570	6,656
Goodwill impairment	0	0	15,091
Stock-based compensation expense	2,826	3,444	4,992
Net investment (gains) losses	15,622	(47,383)	32,395
Net cash flows from trading investments	29,725	38,411	72,753
Deferred income tax benefit	(3,930)	5,632	(17,468)
Changes in:
Accrued investment income	(1,084)	1,219	567
Premiums receivable	(48,958)	521	40,340
Deferred policy acquisition costs	(12,779)	(4,352)	7,198
Reinsurance receivables	(43,138)	32,725	(88,171)
Prepaid reinsurance premiums	(1,972)	3,637	(3,415)
Income taxes receivable	960	33,816	(47,004)
Other assets	(8,136)	(43,865)	(7,291)
Losses, claims and loss settlement expenses	(16,991)	(63,866)	156,377
Unearned premiums	34,655	(25,112)	(40,317)
Accrued expenses and other liabilities	12,972	2,430	(6,129)
Deferred income taxes	(652)	(464)	7,521
Other, net	7,928	(7,637)	9,602
Cash from operating activities	(16,282)	(50,677)	154,141
Net cash provided by (used in) operating activities	(1,251)	29,917	41,435
Cash Flows From Investing Activities
Proceeds from sale of available-for-sale investments	83,559	180,514	50,744
Proceeds from call and maturity of available-for-sale investments	184,210	264,237	318,981
Proceeds from short-term and other investments	12,648	6,387	6,494
Purchase of available-for-sale investments	(284,054)	(395,787)	(438,035)
Purchase of mortgage loans	(103)	0	(5,564)
Purchase of short-term and other investments	(13,294)	(9,644)	(6,629)
Net purchases and sales of property and equipment	(2,137)	(13,976)	(18,862)
Net cash provided by (used in) investing activities	(19,171)	31,731	(92,871)
Cash Flows From Financing Activities
Borrowings of long-term debt	0	0	50,000
Payment of cash dividends	(15,860)	(15,064)	(28,526)
Repurchase of common stock	0	(2,007)	(2,741)
Issuance of common stock	828	(421)	(71)
Net cash provided by (used in) financing activities	(15,032)	(17,492)	18,662
Net Change in Cash and Cash Equivalents	(35,454)	44,156	(32,774)
Cash and Cash Equivalents at Beginning of Year	132,104	87,948	120,722
Cash and Cash Equivalents at End of Year	96,650	132,104	87,948
Supplemental Cash Flow Information [Abstract]
Income taxes paid	21,548	5,360	138
Interest paid	$ 3,188	$ 3,187	$ 0