Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Investments:
Fixed maturity securities, available for sale, at fair value (amortized cost: 2019 - $48,170,556; 2018 - $46,131,190)	$ 51,854,384	$ 45,923,727
Mortgage loans on real estate	3,212,075	2,943,091
Derivative instruments	963,081	205,149
Other investments	694,416	355,531
Total investments	56,723,956	49,427,498
Cash and cash equivalents	1,138,737	344,396
Coinsurance deposits	5,072,015	4,954,068
Accrued investment income	497,291	468,729
Deferred policy acquisition costs	2,883,599	3,535,838
Deferred sales inducements	1,952,353	2,516,721
Deferred income taxes	0	291,169
Income taxes recoverable	30,277	26,537
Other assets	31,765	60,608
Total assets	68,329,993	61,625,564
Liabilities:
Policy benefit reserves	61,348,138	57,606,009
Other policy funds and contract claims	259,939	270,858
Notes payable	494,982	494,591
Subordinated debentures	243,311	242,982
Amounts due under repurchase agreements	48,931	109,298
Deferred income taxes	143,195	0
Other liabilities	1,664,781	502,725
Total liabilities	64,203,277	59,226,463
Stockholders' equity:
Preferred stock, par value $1 per share, 2,000,000 shares authorized, 2019 and 2018 - no shares issued and outstanding	0	0
Common stock, par value $1 per share, 200,000,000 shares authorized; issued and outstanding: 2019 - 91,006,950 shares (excluding 1,393,973 treasury shares); 2018 - 90,369,229 shares (excluding 1,535,960 treasury shares)	91,007	90,369
Additional paid-in capital	820,362	811,186
Accumulated other comprehensive income (loss)	1,639,429	(52,432)
Retained earnings	1,575,918	1,549,978
Total stockholders' equity	4,126,716	2,399,101
Total liabilities and stockholders' equity	$ 68,329,993	$ 61,625,564