Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Investments:
Debt securities available for sale, amortized cost	$ 8,438,760	$ 8,604,250
Debt securities, trading, cost	1,269,597	1,066,108
Mortgage loans-allowance for possible losses	3,575	2,987
Mortgage loans - fair value	19,334	8,469
Equity securities, cost	14,547	16,549
Allowance related to reinsurance	$ 450	$ 0
Class A
STOCKHOLDERS’ EQUITY
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	7,500,000	7,500,000
Common stock, shares issued (in shares)	3,436,020	3,436,020
Common stock, shares outstanding (in shares)	3,436,020	3,436,020
Class B
STOCKHOLDERS’ EQUITY
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	200,000	200,000
Common stock, shares issued (in shares)	200,000	200,000
Common stock, shares outstanding (in shares)	200,000	200,000