Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating activities
Net income (loss)	$ (4,482)	$ (11,420)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Interest sensitive and index product benefits	641,211	387,777
Amortization of deferred sales inducements	(1,587)	53,094
Annuity product charges	(122,987)	(113,666)
Change in fair value of embedded derivatives	(123,126)	1,093,885
Change in traditional life and accident and health insurance reserves	3,322	(2,889)
Policy acquisition costs deferred	(123,861)	(236,076)
Amortization of deferred policy acquisition costs	813	75,078
Provision for depreciation and other amortization	2,485	1,916
Amortization of discounts and premiums on investments	17,645	12,734
Realized gains/losses on investments	46,224	4,395
Realized gains/losses on investments		5,608
Distributions from equity method investments	0	753
Change in fair value of derivatives	614,212	(460,326)
Deferred income taxes	(7,132)	(11,207)
Loss on extinguishment of debt	2,024	0
Share-based compensation	4,394	7,360
Change in accrued investment income	22,536	(11,935)
Change in income taxes recoverable/payable	(36,391)	(21,547)
Change in other assets	3,055	(4,868)
Change in other policy funds and contract claims	(15,222)	(10,605)
Change in collateral held for derivatives	(727,069)	680,208
Change in collateral held for securities lending	(494,280)	441,908
Change in other liabilities	(36,407)	1,306
Other	6,727	(5,854)
Net cash provided by (used in) operating activities	(327,896)	1,871,234
Sales, maturities, or repayments of investments:
Fixed maturity securities, available for sale	2,413,147	859,767
Mortgage loans on real estate	129,531	136,035
Derivative instruments	430,662	238,557
Other investments	3,013	3,407
Acquisitions of investments:
Fixed maturity securities, available for sale	(1,137,134)	(2,199,848)
Mortgage loans on real estate	(654,936)	(276,385)
Derivative instruments	(389,877)	(419,798)
Other investments	(4,936)	(291,519)
Purchases of property, furniture and equipment	(11,624)	(1,400)
Net cash provided by (used in) investing activities	777,846	(1,951,184)
Financing activities
Receipts credited to annuity policyholder account balances	1,248,172	2,732,241
Coinsurance deposits	204,759	59,190
Return of annuity policyholder account balances	(1,971,344)	(1,726,013)
Repayment of subordinated debentures	(81,450)	0
Net proceeds from amounts due under repurchase agreements	0	(109,298)
Proceeds from issuance of preferred stock, net	290,260	0
Proceeds from issuance of common stock, net	1,706	18
Change in checks in excess of cash balance	(14,249)	(4,617)
Preferred stock dividends	(12,561)	0
Net cash provided by (used in) financing activities	(334,707)	951,521
Increase in cash and cash equivalents	115,243	871,571
Cash and cash equivalents at beginning of period	2,293,392	344,396
Cash and cash equivalents at end of period	2,408,635	1,215,967
Cash paid during period for interest:
Interest expense	16,427	22,513
Cash paid (received) during period for income taxes:
Income taxes	(161)
Income taxes		28,193
Non-cash operating activity:
Deferral of sales inducements	$ 47,262	$ 93,991