Schedule II - Condensed Statement of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Activities
Net income	$ 31,458	$ 21,859	$ 25,701
Depreciation	1,759	1,657	1,435
Amortization of investments, net	712	748	788
Net loss on disposals of property	(46)	12	(23)
Net realized (gain) loss on securities	(1,343)	117	(1,201)
Net unrealized loss on equity investments	(10,303)	4,130	0
Net (earnings) loss from other investments	3	(7)	(22)
Provision (benefit) for deferred income taxes	2,278	(4,074)	(4,664)
(Increase) decrease in receivables	(395)	(2,097)	(1,505)
Decrease (increase) in income taxes receivable	0	385	(385)
(Increase) decrease in other assets	1,654	540	388
Increase (decrease) in accounts payable and accrued liabilities	583	216	1,463
Net cash provided by (used in) operating activities	20,916	24,386	19,893
Investing Activities
Purchases of short-term securities	(98,476)	(94,781)	(26,414)
Purchases of and net earnings from other investments	(2,536)	(1,544)	(1,873)
Proceeds from sales and maturities of fixed maturity securities	12,530	11,520	17,445
Proceeds from sales and maturities of short-term investments	118,364	86,105	9,228
Proceeds from sales and distributions of other investments	3,192	3,055	2,696
Purchases of property	(1,486)	(1,859)	(2,884)
Net cash provided by (used in) investing activities	4,489	(2,807)	(20,288)
Financing Activities
Repurchases of common stock	(19)	(29)	(246)
Exercise of stock appreciation rights	0	(1)	0
Dividends paid	(18,131)	(23,017)	(7,073)
Net cash provided by (used in) financing activities	(18,150)	(23,099)	(7,319)
Net Increase (Decrease) in Cash and Cash Equivalents	7,255	(1,520)	(7,714)
Cash and Cash Equivalents, Beginning of Period	18,694	20,214	27,928
Cash and Cash Equivalents, End of Period	25,949	18,694	20,214
Parent Company
Operating Activities
Net income	31,458	21,859	25,701
Equity in net earnings of subsidiaries	(30,804)	(22,014)	(25,634)
Depreciation	99	98	98
Amortization of investments, net	139	222	158
Share-based compensation expense related to stock appreciation rights	264	327	219
Net loss on disposals of property	0	0	3
Net realized (gain) loss on securities	(37)	(27)	(36)
Net unrealized loss on equity investments	(797)	384	0
Net (earnings) loss from other investments	(226)	(81)	5
Provision (benefit) for deferred income taxes	269	(51)	(211)
(Increase) decrease in receivables	(460)	(122)	362
Decrease (increase) in income taxes receivable	1,652	1,441	(1,316)
(Increase) decrease in other assets	(135)	12	(112)
Increase (decrease) in accounts payable and accrued liabilities	281	274	(455)
Net cash provided by (used in) operating activities	1,703	2,322	(1,218)
Investing Activities
Dividends received from subsidiaries	34,925	15,125	14,816
Purchases of fixed maturity and equity securities	(24,503)	(476)	(13,178)
Purchases of short-term securities	(39,635)	(33,835)	(5,835)
Purchases of and net earnings from other investments	0	(579)	(1,050)
Proceeds from sales and maturities of fixed maturity securities	8,200	5,753	6,617
Proceeds from sales and maturities of short-term investments	45,279	30,403	3,189
Proceeds from sales and distributions of other investments	904	669	196
Proceeds from sales of other assets	0	1	0
Purchases of property	(12)	(343)	(14)
Net cash provided by (used in) investing activities	25,158	16,718	4,741
Financing Activities
Repurchases of common stock	(19)	(29)	(246)
Exercise of stock appreciation rights	0	(1)	0
Capital contribution to subsidiaries	(600)	(325)	(510)
Dividends paid	(18,131)	(23,017)	(7,073)
Net cash provided by (used in) financing activities	(18,750)	(23,372)	(7,829)
Net Increase (Decrease) in Cash and Cash Equivalents	8,111	(4,332)	(4,306)
Cash and Cash Equivalents, Beginning of Period	1,540	5,872	10,178
Cash and Cash Equivalents, End of Period	9,651	1,540	5,872
Supplemental Disclosures:
Income tax payments, net	$ 9,472	$ 5,448	$ 11,447