Consolidated Statements of Financial Position (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Investments:
Fixed maturities available-for-sale, cost	$ 1,361,254	$ 1,343,755
Limited partnership	62,564	56,038
Due premiums, allowance for doubtful accounts	$ 109	$ 111
Common Stock Class A [Member]
Liabilities and Stockholders' Equity
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	53,532,873	53,170,413
Common stock, shares outstanding (in shares)	53,532,873	53,170,413
Common stock, shares in treasury (in shares)	3,135,738	3,135,738
Common Stock Class B [Member]
Liabilities and Stockholders' Equity
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	2,000,000	2,000,000
Common stock, shares issued (in shares)	1,001,714	1,001,714
Common stock, shares outstanding (in shares)	1,001,714	1,001,714
Common stock, shares in treasury (in shares)	1,001,714	1,001,714