Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Investments:
Fixed maturity securities, available for sale, at fair value (amortized cost of $46,951,043 as of 2020 and $48,238,946 as of 2019; allowance for credit losses of $50,186 as of 2020)	$ 50,738,792	$ 51,580,490
Mortgage loans on real estate (net of allowance for credit losses of $20,089 as of 2020 and $9,179 as of 2019)	3,958,233	3,448,793
Derivative instruments	672,958	1,355,989
Other investments	479,099	492,301
Total investments	55,849,082	56,877,573
Cash and cash equivalents	2,408,635	2,293,392
Coinsurance deposits (net of allowance for credit losses of $3,948 as of 2020 and $0 as of 2019)	4,962,859	5,115,013
Accrued investment income	450,290	472,826
Deferred policy acquisition costs	2,920,793	2,923,454
Deferred sales inducements	1,937,083	1,966,723
Income taxes recoverable	35,962	0
Other assets	43,592	47,571
Total assets	68,608,296	69,696,552
Liabilities:
Policy benefit reserves	61,669,232	61,893,945
Other policy funds and contract claims	244,186	256,105
Notes payable	495,388	495,116
Subordinated debentures	77,964	157,265
Deferred income taxes	229,757	177,897
Income taxes payable	0	429
Other liabilities	829,710	2,145,676
Total liabilities	63,546,237	65,126,433
Stockholders' equity:
Common stock; par value $1 per share; 200,000,000 shares authorized; issued and outstanding: 2020 - 91,595,066 shares (excluding 1,171,451 treasury shares); 2019 - 91,107,555 shares (excluding 1,344,193 treasury shares)	91,595	91,107
Additional paid-in capital	1,508,171	1,212,311
Accumulated other comprehensive income	1,719,839	1,497,921
Retained earnings	1,742,426	1,768,764
Total stockholders' equity	5,062,059	4,570,119
Total liabilities and stockholders' equity	68,608,296	69,696,552
Preferred Stock, Series A
Stockholders' equity:
Preferred stock	16	16
Preferred Stock, Series B
Stockholders' equity:
Preferred stock	$ 12	$ 0