Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 395,217	$ 508,003	$ 779,668
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Policy charges and fee income	113,501	(8,770)	(72,375)
Interest credited to policyholders’ account balances	301,220	374,211	368,315
Realized investment (gains) losses, net	(758,449)	208,538	(114,067)
Depreciation, Depletion and Amortization, Nonproduction	(70,104)	(68,070)	(62,723)
Change in:
Future policy benefits	1,816,665	1,534,228	1,440,542
Reinsurance recoverables	(1,764,242)	(1,559,165)	(1,330,796)
Accrued investment income	12,709	(9,525)	(2,174)
Net payables to/receivables from parent and affiliates	(9,851)	20,299	18,037
Deferred policy acquisition costs	311,273	43,168	(194,907)
Income taxes	(45,147)	(36,879)	65,900
Derivatives, net	(198,861)	60,517	155,556
Other, net	(110,850)	76,374	26,716
Cash flows from (used in) operating activities	(6,919)	1,142,929	1,077,692
Proceeds from the sale/maturity/prepayment of:
Fixed maturities, available-for-sale	1,371,000	813,721	907,665
Short-term investments	260,027	823,112	409,804
Policy loans	137,778	135,449	121,644
Ceded policy loans	(8,989)	(9,129)	(9,753)
Commercial mortgage and other loans	209,263	219,379	113,073
Other long-term investments	12,479	15,633	5,361
Equity securities, available-for-sale	34,618	5,760	17,854
Trading account assets	1,595	1,500	1,375
Payments for the purchase/origination of:
Fixed maturities, available-for-sale	(2,465,763)	(1,719,015)	(1,340,010)
Short-term investments	(241,827)	(755,145)	(514,524)
Policy loans	(120,628)	(110,165)	(114,037)
Ceded policy loans	18,054	13,850	10,960
Commercial mortgage and other loans	(312,898)	(196,538)	(320,155)
Other long-term investments	(32,307)	(49,004)	(47,096)
Equity securities, available-for-sale	(5,000)	(31,063)	(45,101)
Trading account assets	0	(19,001)	(32,060)
Notes receivable from parent and affiliates, net	20,463	35,350	(7,831)
Derivatives, net	20,954	(12,164)	(11,329)
Other, net	(261)	(584)	616
Cash flows from (used in) investing activities	(1,101,442)	(838,054)	(853,544)
CASH FLOWS FROM FINANCING ACTIVITIES:
Policyholders’ account deposits	4,289,697	3,839,784	2,966,388
Ceded policyholders’ account deposits	(2,430,570)	(1,109,311)	(672,242)
Policyholders’ account withdrawals	(2,505,219)	(2,134,373)	(1,730,977)
Ceded policyholders’ account withdrawals	1,072,151	50,016	46,690
Net change in securities sold under agreement to repurchase and cash collateral for loaned securities	103,463	(25,002)	(19,449)
Dividend to parent	0	(430,000)	(748,000)
Contributed capital	405,321	0	0
Contributed (distributed) capital - parent/child asset transfers	1,676	(18,739)	(17,306)
Net change in financing arrangements (maturities 90 days or less)	0	0	(2,900)
Proceeds from the issuance of debt (maturities longer than 90 days)	0	412,000	418,000
Repayments of debt (maturities longer than 90 days)	(125,000)	(739,000)	(571,000)
Drafts outstanding	22,713	5,084	14,357
Cash flows from (used in) financing activities	834,232	(149,541)	(316,439)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(274,129)	155,334	(92,291)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	370,286	214,952	307,243
CASH AND CASH EQUIVALENTS, END OF YEAR	96,157	370,286	214,952
SUPPLEMENTAL CASH FLOW INFORMATION
Income taxes paid/(received)	(28,772)	26,237	129,430
Interest paid	$ 16,263	$ 53,122	$ 62,664