Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fixed maturities, available for sale, amortized cost	$ 18,914,693	$ 18,301,692
Fixed maturities, available for sale, allowance for credit losses	7,500	0
Other long-term investments under fair value option	1,050,106	976,016
Net liabilities for future policy benefits	16,757,558	16,306,870
Total long-term debt, fair value	$ 1,586,674	$ 1,440,277
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	320,000,000	320,000,000
Common stock, shares issued (in shares)	105,218,183	105,218,183
Common stock, shares outstanding (in shares)	105,218,183	105,218,183
Common stock, shares held in treasury (in shares)	10,952,084	8,478,288
Partnership Interest - Fair Value Option | Investment in Limited Partnerships
Other long-term investments under fair value option	$ 782,210	$ 768,689