Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 324,432	$ 395,217	$ 508,003
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Policy charges and fee income	(142,781)	113,501	(8,770)
Interest credited to policyholders’ account balances	168,391	301,220	374,211
Realized investment (gains) losses, net	80,186	(758,449)	208,538
Amortization and other non-cash items	(65,536)	(70,104)	(68,070)
Change in:
Future policy benefits	1,934,713	1,816,665	1,534,228
Reinsurance recoverables	(2,080,452)	(1,764,242)	(1,559,165)
Accrued investment income	(3,692)	12,709	(9,525)
Net payables to/receivables from parent and affiliates	43,913	(9,851)	20,299
Deferred policy acquisition costs	(183,884)	311,273	43,168
Income taxes	(74,156)	(45,147)	(36,879)
Derivatives, net	55,104	(198,861)	60,517
Other, net	47,594	(110,850)	76,374
Cash flows from (used in) operating activities	103,832	(6,919)	1,142,929
Proceeds from the sale/maturity/prepayment of:
Fixed maturities, available-for-sale	1,062,236	1,371,000	813,721
Short-term investments	72,725	260,027	823,112
Policy loans	143,655	137,778	135,449
Ceded policy loans	(15,188)	(8,989)	(9,129)
Commercial mortgage and other loans	254,635	209,263	219,379
Other long-term investments	31,192	12,479	15,633
Equity securities, available-for-sale	510	34,618	5,760
Trading account assets	214	1,595	1,500
Payments for the purchase/origination of:
Fixed maturities, available-for-sale	(1,315,508)	(2,465,763)	(1,719,015)
Short-term investments	(37,407)	(241,827)	(755,145)
Policy loans	(123,645)	(120,628)	(110,165)
Ceded policy loans	18,942	18,054	13,850
Commercial mortgage and other loans	(180,929)	(312,898)	(196,538)
Other long-term investments	(32,275)	(32,307)	(49,004)
Equity securities, available-for-sale	(5,000)	(5,000)	(31,063)
Trading account assets	(15,019)	0	(19,001)
Notes receivable from parent and affiliates, net	5,731	20,463	35,350
Derivatives, net	(17,569)	20,954	(12,164)
Other, net	(152,576)	(261)	(584)
Cash flows from (used in) investing activities	(305,276)	(1,101,442)	(838,054)
CASH FLOWS FROM FINANCING ACTIVITIES:
Policyholders’ account deposits	4,540,655	4,289,697	3,839,784
Ceded policyholders’ account deposits	(3,083,049)	(2,430,570)	(1,109,311)
Policyholders’ account withdrawals	(2,682,445)	(2,505,219)	(2,134,373)
Ceded policyholders’ account withdrawals	1,692,756	1,072,151	50,016
Net change in securities sold under agreement to repurchase and cash collateral for loaned securities	(110,710)	103,463	(25,002)
Dividend to parent	(250,000)	0	(430,000)
Contributed capital	148,500	405,321	0
Contributed (distributed) capital - parent/child asset transfers	2,354	1,676	(18,739)
Proceeds from the issuance of debt (maturities longer than 90 days)	0	0	412,000
Repayments of debt (maturities longer than 90 days)	0	(125,000)	(739,000)
Drafts outstanding	59,795	22,713	5,084
Cash flows from (used in) financing activities	317,856	834,232	(149,541)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	116,412	(274,129)	155,334
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	96,157	370,286	214,952
CASH AND CASH EQUIVALENTS, END OF YEAR	212,569	96,157	370,286
SUPPLEMENTAL CASH FLOW INFORMATION
Income taxes paid, net of refunds	(45,538)	(28,772)	26,237
Interest paid	2,179	$ 16,263	$ 53,122
Significant Non-Cash Transactions
Increase (Decrease) In Fixed Maturities, Available For Sale, Investing Activities	(837,000)
Increase (Decrease) In Other Long Term Investments, Tax Settlements, Investing Activities	$ (35,000)