Schedule II - Condensed Statement of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Operating Activities
Net income	$ 67,020	$ 39,420
Depreciation	1,892	1,759
Share-based compensation expense related to stock appreciation rights	299	229
Net gain on disposals of property	(3,957)	(26)
Net realized gain on securities	(911)	(311)
Net realized gain on other investments	(958)	(22)
Changes in the estimated fair value of equity security investments	(14,934)	(4,904)
Net earnings from other investments	(4,040)	(2,880)
Provision for deferred income taxes	4,825	1,218
Increase in receivables	(3,526)	(6,904)
Decrease in other assets	(9,017)	(3,977)
Increase (decrease) in current income taxes payable	2,691	(702)
Increase (decrease) in accounts payable and accrued liabilities	7,848	7,559
Net cash provided by (used in) operating activities	51,931	34,095
Investing Activities
Purchases of short-term securities	(34,015)	(16,427)
Purchases of and net earnings from other investments	(6,616)	(1,714)
Proceeds from sales and maturities of short-term investments	3,257	14,398
Proceeds from sales and distributions of other investments	5,838	3,083
Proceeds from sales of other assets	960	22
Purchases of property	(6,534)	(3,202)
Proceeds from disposals of property	6,739	85
Net cash provided by (used in) investing activities	9,068	(14,600)
Financing Activities
Repurchases of common stock	0	(6)
Exercise of stock appreciation rights	(1)	1
Dividends paid	(37,553)	(31,716)
Net cash provided by (used in) financing activities	(37,554)	(31,721)
Cash and Cash Equivalents, Beginning of Period	13,723
Cash and Cash Equivalents, End of Period	37,168	13,723
Parent Company
Operating Activities
Net income	67,020	39,420
Equity in net earnings of subsidiaries	(61,372)	(39,685)
Depreciation	110	99
Amortization of investments, net	(51)	198
Share-based compensation expense related to stock appreciation rights	299	229
Net gain on disposals of property	(3,937)	0
Net realized gain on securities	(92)	495
Net realized gain on other investments	(958)	(22)
Changes in the estimated fair value of equity security investments	(1,182)	(265)
Net earnings from other investments	(238)	(90)
Provision for deferred income taxes	1,214	73
Increase in receivables	(2,660)	(147)
Decrease (increase) in income taxes receivable	2,487	(1,701)
Decrease in other assets	175	114
Increase (decrease) in current income taxes payable	433	0
Increase (decrease) in accounts payable and accrued liabilities	2,201	(158)
Net cash provided by (used in) operating activities	3,449	(1,440)
Investing Activities
Dividends received from subsidiaries	30,651	24,043
Purchases of fixed maturity and equity securities	(631)	(691)
Purchases of short-term securities	(21,345)	(7,590)
Purchases of and net earnings from other investments	(5,050)	(97)
Proceeds from sales and maturities of fixed maturity and equity securities	25,512	6,179
Proceeds from sales and maturities of short-term investments	3,028	6,081
Proceeds from sales and distributions of other investments	1,651	440
Proceeds from sales of other assets	958	22
Purchases of property	0	(97)
Proceeds from disposals of property	4,585	0
Net cash provided by (used in) investing activities	39,359	28,290
Financing Activities
Repurchases of common stock	0	(6)
Exercise of stock appreciation rights	(1)	1
Capital contribution to subsidiaries	(8,350)	(1,100)
Dividends paid	(37,553)	(31,716)
Net cash provided by (used in) financing activities	(45,904)	(32,821)
Net Decrease in Cash and Cash Equivalents	(3,096)	(5,971)
Cash and Cash Equivalents, Beginning of Period	3,680	9,651
Cash and Cash Equivalents, End of Period	584	3,680
Supplemental Disclosures:
Income tax payments, net	$ 10,156	$ 10,113