Consolidated Statements of Financial Position (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Investments:
Fixed maturities available-for-sale, cost	$ 1,343,755	$ 1,321,487
Private equity funds	56,038	11,923
Allowance for Loan and Lease Losses, Real Estate	0	11
Allowance for Loan and Lease Losses, Real Estate	0	11
Accounts Receivable, Allowance for Credit Loss	$ 111	$ 297
Common Stock Class A [Member]
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)	53,170,413	52,654,016
Common stock, shares outstanding (in shares)	53,170,413	52,654,016
Common stock, shares in treasury (in shares)	3,135,738	3,135,738
Common Stock Class B [Member]
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