Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fixed maturity securities:
Available for sale, at fair value (amortized cost: 2015 - $35,823,710; 2014 - $30,205,046)	$ 36,421,839	$ 32,445,202
Held for investment, at amortized cost (fair value: 2015 - $65,377; 2014 - $75,838)	76,622	76,432
Equity securities, available for sale, at fair value (cost: 2015 - $7,515; 2014 - $7,509)	7,828	7,805
Mortgage loans on real estate	2,435,257	2,434,580
Derivative instruments	337,256	731,113
Other investments	291,530	286,726
Total investments	39,570,332	35,981,858
Cash and cash equivalents	397,749	701,514
Coinsurance deposits	3,187,470	3,044,342
Accrued investment income	362,104	326,559
Deferred policy acquisition costs	2,905,136	2,058,556
Deferred sales inducements	2,232,148	1,587,257
Deferred income taxes	232,683	0
Income taxes recoverable	29,599	9,252
Other assets	123,942	280,396
Total assets	49,041,163	43,989,734
Liabilities:
Policy benefit reserves	45,495,431	39,802,861
Other policy funds and contract claims	324,850	365,819
Notes payable	400,000	421,679
Subordinated debentures	246,450	246,243
Deferred income taxes	0	3,895
Other liabilities	629,897	1,009,361
Total liabilities	47,096,628	41,849,858
Stockholders' equity:
Preferred stock, par value $1 per share, 2,000,000 shares authorized, 2015 and 2014 - no shares issued and outstanding	0	0
Common stock, par value $1 per share, 200,000,000 shares authorized; issued and outstanding: 2015 - 81,354,079 shares (excluding 3,448,750 treasury shares); 2014 - 76,062,407 shares (excluding 4,126,167 treasury shares)	81,354	76,062
Additional paid-in capital	630,367	513,218
Accumulated other comprehensive income	201,663	721,401
Retained earnings	1,031,151	829,195
Total stockholders' equity	1,944,535	2,139,876
Total liabilities and stockholders' equity	$ 49,041,163	$ 43,989,734