MONY CLOSED BLOCK OF BUSINESS (Details) - USD ($) $ in Thousands	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2015	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Jan. 31, 2015
Successor
Closed block liabilities
Future policy benefits, policyholders' account balances and other policyholder liabilities				$ 5,896,355	$ 6,010,520
Policyholder dividend obligation	$ 323,432	$ 0	$ 0	31,932	0	$ 323,432
Other liabilities				40,007	24,539
Total closed block liabilities				5,968,294	6,035,059
Closed block assets
Fixed maturities, available-for-sale, at fair value				4,440,105	4,426,090
Mortgage loans on real estate				201,088	247,162
Policy loans				712,959	746,102
Cash and other invested assets				108,270	34,420
Other assets				135,794	162,640
Total closed block assets				5,598,216	5,616,414
Excess of reported closed block liabilities over closed block assets				370,078	418,645
Portion of above representing accumulated other comprehensive income:
Net unrealized investments gains (losses) net of policyholder dividend obligation of $(128,343) (Successor) and $(179,360) (Successor)					(18,597)
Future earnings to be recognized from closed block assets and closed block liabilities				370,078	400,048
Policyholder dividend obligation				(128,343)	(179,360)
Reconciliation of the policyholder dividend obligation
Policyholder dividend obligation, beginning balance		323,432	0
Applicable to net revenue (losses)		(47,493)	(46,557)
Change in net unrealized investment gains (losses) allocated to policyholder dividend obligation; includes deferred tax benefits of $69,108 (2016 - Successor); $(96,579) (2015 - Successor); $47,277 (2015 - Predecessor)		(275,939)	78,489
Policyholder dividend obligation, ending balance	323,432	0	31,932
Deferred tax benefit				$ 69,108	$ (96,579)
Revenues
Premiums and other income		185,562	189,700
Net investment income		193,203	211,175
Net investment gains		3,333	1,524
Total revenues		382,098	402,399
Benefits and other deductions
Benefits and settlement expenses		336,629	353,488
Other operating expenses		1,001	2,804
Total benefits and other deductions		337,630	356,292
Net revenues before income taxes		44,468	46,107
Income tax expense		14,920	16,137
Net revenues		29,548	$ 29,970
Predecessor
Closed block liabilities
Policyholder dividend obligation	366,745	500,453				500,453
Reconciliation of the policyholder dividend obligation
Policyholder dividend obligation, beginning balance	366,745	$ 500,453
Applicable to net revenue (losses)	(1,369)
Change in net unrealized investment gains (losses) allocated to policyholder dividend obligation; includes deferred tax benefits of $69,108 (2016 - Successor); $(96,579) (2015 - Successor); $47,277 (2015 - Predecessor)	135,077
Policyholder dividend obligation, ending balance	500,453
Deferred tax benefit						$ 47,277
Revenues
Premiums and other income	15,065
Net investment income	19,107
Net investment gains	568
Total revenues	34,740
Benefits and other deductions
Benefits and settlement expenses	31,152
Other operating expenses	0
Total benefits and other deductions	31,152
Net revenues before income taxes	3,588
Income tax expense	1,256
Net revenues	$ 2,332