Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 130,710	$ 138,211	$ 99,601
Adjustments to reconcile net income to net cash provided by operating activities:
Investment amortization, net	4,234	6,541	4,922
Fixed asset depreciation, net	6,896	7,527	5,485
Stock based compensation	6,292	7,459	6,030
Credit for deferred income taxes	5,323	5,159	4,757
Net realized gains on investments	(14,885)	(957)	(2,976)
Net impairment losses on investments			889
Credit loss (benefit) expense	(363)	1,054
Earnings from partnership investments	(13,896)	(1,932)	(904)
Change in net unrealized gains on equity securities	(16,130)	(10,449)	(21,454)
Changes in assets and liabilities:
Accounts receivable, net	8,194	14,222	(3,307)
Accrued investment income	644	359	16
Receivable from reinsurers	10,842	13,948	(11,602)
Ceded unearned premiums	(1,389)	12,776	(1,208)
Deferred policy acquisition costs	1,938	(675)	(932)
Taxes recoverable/payable	(1,229)	724	(1,003)
Other assets	(3,346)	(15)	(1,864)
Loss and loss adjustment expense reserves	3,070	(42,985)	25,847
Unearned premium reserves	(8,414)	(20,318)	6,839
Taxes payable			(6,090)
Accounts payable and accrued liabilities	(2,876)	4,310	3,395
Payable to reinsurers	956	(4,675)	691
Other liabilities	24,823	(20,824)	5,324
Net cash provided by operating activities	141,394	109,460	112,456
Cash flows from investing activities:
Fixed maturities purchased	(355,561)	(217,269)	(219,875)
Short term investments purchased		(441)
Equity securities purchased	(59,296)	(49,326)	(28,586)
Other invested assets purchased	(32,814)	(11,868)	(14,794)
Proceeds from sales and paydowns of fixed maturities	213,665	126,555	135,119
Proceeds from maturities, redemptions, and calls of fixed maturities	144,910	86,390	58,676
Proceed from sales of equity securities	26,724	34,542	23,966
Proceeds from other invested assets redeemed	4,608	5,839	2,124
Fixed assets purchased	(8,225)	(9,946)	(9,594)
Net cash used for investing activities	(65,989)	(35,524)	(52,964)
Cash flows from financing activities:
Proceeds from FHLB loan		30,000
Dividends paid to shareholders	(54,008)	(54,575)	(52,667)
Acquisition of treasury stock	(11,563)	(39,999)
Net cash used for financing activities	(65,571)	(64,574)	(52,667)
Net increase in cash and cash equivalents	9,834	9,362	6,825
Cash and cash equivalents at beginning of year	53,769	44,407	37,582
Cash and cash equivalents at end of period	63,603	53,769	44,407
Supplemental disclosure of cash flow information:
Federal and state income taxes	29,190	31,080	26,780
Interest	$ 507	$ 388	$ 75