CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net income	$ 552,984	$ 193,927	$ 1,182,417
Adjustments to reconcile net income to net cash provided by operating activities:
Realized investment losses (gains)	(177,086)	173,903	25,066
Amortization of deferred policy acquisition costs and value of business acquired	175,653	226,066	79,443
Capitalization of deferred policy acquisition costs	(407,556)	(446,594)	(335,603)
Depreciation and amortization expense	74,216	67,125	61,740
Deferred income tax	(259,850)	(69,963)	(754,974)
Accrued income tax	7,035	104,175	19,377
Interest credited to universal life and investment products	1,342,563	963,471	692,993
Policy fees assessed on universal life and investment products	(1,729,044)	(1,553,994)	(1,354,685)
Change in reinsurance receivables	304,929	315,134	269,294
Change in accrued investment income and other receivables	(45,117)	50,112	(19,148)
Change in policy liabilities and other policyholders’ funds of traditional life and health products	(543,963)	(550,367)	(331,880)
Trading securities:
Maturities and principal reductions of investments	113,543	155,692	165,575
Sale of investments	399,288	493,141	281,441
Cost of investments acquired	(368,369)	(589,379)	(355,410)
Other net change in trading securities	(47,635)	38,346	9,151
Amortization of premiums and accretion of discounts on investments and mortgage loans	319,467	308,407	319,264
Change in other liabilities	408,700	103,465	265,595
Other, net	(28)	(15,655)	(45,961)
Net cash provided by (used in) operating activities	119,730	(32,988)	173,695
Cash flows from investing activities
Maturities and principal reductions of investments, available-for-sale	1,980,966	1,189,366	695,349
Sale of investments, available-for-sale	4,242,259	2,573,826	1,801,173
Cost of investments acquired, available-for-sale	(6,421,411)	(4,865,104)	(4,013,245)
Change in investments, held-to-maturity	(195,000)	81,000	47,000
Mortgage loans:
New lendings	(1,322,981)	(1,589,459)	(1,671,929)
Repayments	1,016,899	1,068,552	923,347
Change in investment real estate, net	(3,366)	978	(104)
Change in policy loans, net	64,767	51,218	34,625
Change in other long-term investments, net	(35,536)	(169,293)	(91,934)
Change in short-term investments, net	(594,314)	(164,384)	(207,722)
Net unsettled security transactions	(184,963)	13,384	(19,023)
Purchase of property and equipment	(33,306)	(91,972)	(33,718)
Cash received (paid) related to reinsurance transactions	(815,574)	38,456	0
Net cash used in investing activities	(2,301,560)	(1,863,432)	(2,536,181)
Cash flows from financing activities
Borrowings under subordinated debt	0	110,000	0
Issuance (repayment) of non-recourse funding obligations	195,000	(63,890)	(16,070)
Secured financing liabilities	(159,826)	(522,442)
Secured financing liabilities			220,028
Capital Contributions from parent	850,000
Dividends/return of capital to the parent company		0	(303,000)
Investment product and universal life deposits	5,183,845	5,650,100	4,683,121
Investment product and universal life withdrawals	(3,865,961)	(3,304,415)	(2,256,981)
Other financing activities, net	(876)	(388)	(196)
Net cash provided by financing activities	2,202,182	1,868,965	2,326,902
Change in cash	20,352	(27,455)	(35,584)
Cash at beginning of period	151,400	178,855	214,439
Cash at end of period	$ 171,752	$ 151,400	$ 178,855