Schedule II - Condensed Balance Sheets (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 24,031	$ 35,311
Fixed maturity securities, available-for-sale, at fair value	63,847	53,989
Common stocks	37,212	51,691
Short-term investments	110,224	103,649
Other investments	17,385	18,368
Prepaid expenses and other receivables	13,525	11,095
Current income taxes receivable	1,081	1,174
Accrued interest and dividends	978	872
Property, net	23,886	17,785
Total Assets	330,559	339,757
Accounts payable and accrued liabilities	31,864	47,050
Deferred income taxes, net	3,546	7,665
Total liabilities	79,006	98,746
Preferred stock (1,000 authorized shares; no shares issued)	0	0
Common stock – no par value (10,000 authorized shares; 1,891 and 1,897 shares issued and outstanding as of December 31, 2023 and 2022, respectively, excluding in each period 292 shares of common stock held by the Company)	0	0
Retained earnings	250,915	240,811
Accumulated other comprehensive income	638	200	$ 3,226
Total shareholders’ equity	251,553	241,011	229,087
Total Liabilities and Shareholders’ Equity	$ 330,559	$ 339,757
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	1,891	1,897
Common stock, shares outstanding	1,891	1,897
Common stock, held by Company's subsidiary	292	292
Parent Company
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 4,409	$ 3,450	$ 584
Fixed maturity securities, available-for-sale, at fair value	4,287	5,900
Common stocks	188	325
Short-term investments	83,095	64,832
Investments in affiliated companies	148,934	159,700
Other investments	4,172	6,703
Prepaid expenses and other receivables	5,516	3,864
Current income taxes receivable	1,293	2,799
Accrued interest and dividends	192	185
Property, net	1,562	1,691
Total Assets	253,648	249,449
Accounts payable and accrued liabilities	1,842	7,726
Deferred income taxes, net	253	712
Total liabilities	2,095	8,438
Preferred stock (1,000 authorized shares; no shares issued)	0	0
Common stock – no par value (10,000 authorized shares; 1,891 and 1,897 shares issued and outstanding as of December 31, 2023 and 2022, respectively, excluding in each period 292 shares of common stock held by the Company)	0	0
Retained earnings	250,915	240,811
Accumulated other comprehensive income	638	200
Total shareholders’ equity	251,553	241,011
Total Liabilities and Shareholders’ Equity	$ 253,648	$ 249,449
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	1,891	1,897
Common stock, shares outstanding	1,891	1,897
Common stock, held by Company's subsidiary	292	292