Schedule II - Condensed Balance Sheets (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 37,168	$ 13,723
Fixed maturity securities, available-for-sale, at fair value	79,791	117,713
Common stocks	76,853	64,919
Short-term investments	45,930	15,170
Other investments	20,298	15,493
Prepaid expenses and other receivables	11,721	9,418
Accrued interest and dividends	817	1,038
Property, net	13,033	11,160
Total Assets	331,488	282,925
Accounts payable and accrued liabilities	43,868	36,020
Current income taxes payable	3,329	638
Deferred income taxes, net	13,121	8,592
Total liabilities	102,401	82,503
Preferred stock (1,000 authorized shares; no shares issued)	0	0
Common stock – no par value (10,000 authorized shares; 1,895 and 1,892 shares issued and outstanding as of December 31, 2021 and 2020, respectively, excluding in each period 292 shares of common stock held by the Company)	0	0
Retained earnings	225,861	196,096
Accumulated other comprehensive income	3,226	4,326	$ 3,100
Total shareholders’ equity	229,087	200,422	191,362
Total Liabilities and Shareholders’ Equity	$ 331,488	$ 282,925
Preferred stock, shares authorized	1,000	1,000
Preferred stock, shares issued	0	0
Common stock, no par value	$ 0	$ 0
Common stock, shares authorized	10,000	10,000
Common stock, shares issued	1,895	1,892
Common stock, shares outstanding	1,895	1,892
Common stock, held by Company's subsidiary	292	292
Parent Company
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 584	$ 3,680	$ 9,651
Fixed maturity securities, available-for-sale, at fair value	2,222	27,311
Common stocks	5,946	4,554
Short-term investments	23,637	5,318
Investments in affiliated companies	188,698	150,620
Other investments	7,840	4,215
Prepaid expenses and other receivables	5,113	2,453
Current income taxes receivable	0	2,487
Accrued interest and dividends	32	207
Property, net	1,665	2,410
Total Assets	235,737	203,255
Accounts payable and accrued liabilities	4,514	2,313
Current income taxes payable	433	0
Deferred income taxes, net	1,703	520
Total liabilities	6,650	2,833
Preferred stock (1,000 authorized shares; no shares issued)	0	0
Common stock – no par value (10,000 authorized shares; 1,895 and 1,892 shares issued and outstanding as of December 31, 2021 and 2020, respectively, excluding in each period 292 shares of common stock held by the Company)	0	0
Retained earnings	225,861	196,096
Accumulated other comprehensive income	3,226	4,326
Total shareholders’ equity	229,087	200,422
Total Liabilities and Shareholders’ Equity	$ 235,737	$ 203,255
Preferred stock, shares authorized	1,000	1,000
Preferred stock, shares issued	0	0
Common stock, no par value	$ 0	$ 0
Common stock, shares authorized	10,000	10,000
Common stock, shares issued	1,895	1,892
Common stock, shares outstanding	1,895	1,892
Common stock, held by Company's subsidiary	292	292