Schedule II - Condensed Balance Sheets (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 35,311	$ 37,168
Fixed maturity securities, available-for-sale, at fair value	53,989	79,791
Common stocks	51,691	76,853
Short-term investments	103,649	45,930
Other investments	18,368	20,298
Prepaid expenses and other receivables	11,095	11,721
Current income taxes receivable	1,174	0
Accrued interest and dividends	872	817
Property, net	17,785	13,033
Total Assets	339,757	331,488
Accounts payable and accrued liabilities	47,050	43,868
Current income taxes payable	0	3,329
Deferred income taxes, net	7,665	13,121
Total liabilities	98,746	102,401
Preferred stock (1,000 authorized shares; no shares issued)	0	0
Common stock – no par value (10,000 authorized shares; 1,897 and 1,895 shares issued and outstanding as of December 31, 2022 and 2021, respectively, excluding in each period 292 shares of common stock held by the Company)	0	0
Retained earnings	240,811	225,861
Accumulated other comprehensive income	200	3,226	$ 4,326
Total shareholders’ equity	241,011	229,087	200,422
Total Liabilities and Shareholders’ Equity	$ 339,757	$ 331,488
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	1,897	1,895
Common stock, shares outstanding	1,897	1,895
Common stock, held by Company's subsidiary	292	292
Parent Company
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 3,450	$ 584	$ 3,680
Fixed maturity securities, available-for-sale, at fair value	5,900	2,222
Common stocks	325	5,946
Short-term investments	64,832	23,637
Investments in affiliated companies	159,700	188,698
Other investments	6,703	7,840
Prepaid expenses and other receivables	3,864	5,113
Current income taxes receivable	2,799	0
Accrued interest and dividends	185	32
Property, net	1,691	1,665
Total Assets	249,449	235,737
Accounts payable and accrued liabilities	7,726	4,514
Current income taxes payable	0	433
Deferred income taxes, net	712	1,703
Total liabilities	8,438	6,650
Preferred stock (1,000 authorized shares; no shares issued)	0	0
Common stock – no par value (10,000 authorized shares; 1,897 and 1,895 shares issued and outstanding as of December 31, 2022 and 2021, respectively, excluding in each period 292 shares of common stock held by the Company)	0	0
Retained earnings	240,811	225,861
Accumulated other comprehensive income	200	3,226
Total shareholders’ equity	241,011	229,087
Total Liabilities and Shareholders’ Equity	$ 249,449	$ 235,737
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	1,897	1,895
Common stock, shares outstanding	1,897	1,895
Common stock, held by Company's subsidiary	292	292