Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fixed maturities, available for sale, amortized cost	$ 17,996,386	$ 17,805,309
Fixed maturities, available for sale, allowance for credit losses	0	387
Other long-term investments under fair value option	898,955	793,925
Total long-term debt, fair value	$ 1,489,582	$ 1,667,009
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)	109,218,183	109,218,183
Common stock, shares outstanding (in shares)	109,218,183	109,218,183
Common stock, shares held in treasury (in shares)	11,703,370	9,650,845
Partnership Interest - Fair Value Option | Investment in limited partnerships
Other long-term investments under fair value option	$ 740,006	$ 640,263