MONY CLOSED BLOCK OF BUSINESS - Summary of Financial Information for the Closed Block (Details) - Successor - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Jan. 31, 2015
Closed block liabilities
Future policy benefits, policyholders’ account balances and other policyholder liabilities	$ 5,973,811	$ 6,010,520
Policyholder dividend obligation	96,508	0	$ 251,458	$ 323,432
Other liabilities	98,312	22,917
Total closed block liabilities	6,168,631	6,033,437
Closed block assets
Fixed maturities, available-for-sale, at fair value	4,518,308	4,426,090
Equity securities, available-for-sale, at fair value	0	0
Mortgage loans on real estate	246,596	247,162
Policy loans	739,428	746,102
Cash and other invested assets	117,966	34,420
Other assets	155,317	166,445
Total closed block assets	5,777,615	5,620,219
Excess of reported closed block liabilities over closed block assets	391,016	413,218
Portion of above representing accumulated other comprehensive income:
Net unrealized investment gains (losses) net of policyholder dividend obligation of $(103,908) (Successor) and $(179,360) (Successor)	0	(18,597)
Future earnings to be recognized from closed block assets and closed block liabilities	391,016	394,621
Policyholder dividend obligation	$ (103,908)	$ (179,360)