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	$ 46,561	$ 130,710	$ 138,211
Adjustments to reconcile net income to net cash provided by operating activities:
Investment amortization, net	1,693	4,234	6,541
Fixed asset depreciation, net	6,610	6,896	7,527
Stock based compensation	5,980	6,292	7,459
(Credit) provision for deferred income taxes	(8,371)	5,323	5,159
Net realized gains on investments	(9,190)	(14,885)	(957)
Credit loss (benefit) expense	(14)	(363)	1,054
Earnings from partnership investments	(8,388)	(13,896)	(1,932)
Change in net unrealized gains on equity securities	44,386	(16,130)	(10,449)
Changes in assets and liabilities:
Accounts receivable, net	(21,589)	8,194	14,222
Accrued investment income	(811)	644	359
Receivable from reinsurers	2,519	10,842	13,948
Ceded unearned premiums	(4,658)	(1,389)	12,776
Deferred policy acquisition costs	(2,558)	1,938	(675)
Taxes recoverable/payable	3,237	(1,229)	724
Other assets	(6,477)	(3,346)	(15)
Loss and loss adjustment expense reserves	(21,053)	3,070	(42,985)
Unearned premium reserves	19,888	(8,414)	(20,318)
Accounts payable and accrued liabilities	(2,680)	(2,876)	4,310
Payable to reinsurers	2,252	956	(4,675)
Other liabilities	(3,011)	24,823	(20,824)
Net cash provided by operating activities	44,326	141,394	109,460
Cash flows from investing activities:
Fixed maturities purchased	(215,092)	(355,561)	(217,269)
Short term investments purchased			(441)
Equity securities purchased	(52,192)	(59,296)	(49,326)
Other invested assets purchased	(20,204)	(32,814)	(11,868)
Proceeds from sales and paydowns of fixed maturities	154,491	213,665	126,555
Proceeds from maturities, redemptions, and calls of fixed maturities	86,406	144,910	86,390
Proceed from sales of equity securities	43,348	26,724	34,542
Proceeds from other invested assets redeemed	2,933	4,608	5,839
Acquisition net of cash received	(17,586)
Fixed assets purchased	(2,092)	(8,225)	(9,946)
Net cash used for investing activities	(19,988)	(65,989)	(35,524)
Cash flows from financing activities:
Proceeds from FHLB loan	5,000		30,000
Dividends paid to shareholders	(53,038)	(54,008)	(54,575)
Acquisition of treasury stock	(14,603)	(11,563)	(39,999)
Net cash used for financing activities	(62,641)	(65,571)	(64,574)
Net decrease in cash and cash equivalents	(38,303)	9,834	9,362
Cash and cash equivalents at beginning of year	63,603	53,769	44,407
Cash and cash equivalents at end of period	25,300	63,603	53,769
Supplemental disclosure of cash flow information:
Federal and state income taxes	19,119	29,190	31,080
Interest	$ 507	$ 507	$ 388