Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Fixed maturities, available for sale, amortized cost	$ 16,415,776	$ 15,753,471
Other long-term investments under fair value option	326,347	207,258
Total long-term debt, fair value	$ 1,473,364	$ 1,384,455
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)	117,218,183	121,218,183
Common stock, shares outstanding (in shares)	117,218,183	121,218,183
Common stock, shares held in treasury (in shares)	9,497,940	10,525,147
Partnership Interest - Fair Value Option | Investment in limited partnerships
Other long-term investments under fair value option	$ 185,851	$ 108,241