MONY CLOSED BLOCK OF BUSINESS - Schedule of Reconciliation of the Policyholder Dividend Obligation (Details) - USD ($) $ in Thousands	1 Months Ended	8 Months Ended	9 Months Ended
	Jan. 31, 2015	Sep. 30, 2015	Sep. 30, 2016
Successor
Entity Information [Line Items]
Policyholder dividend obligation, beginning of period		$ 323,432	$ 0
Applicable to net revenue (losses)		(27,854)	(36,707)
Change in net unrealized investment gains (losses) allocated to the policyholder dividend obligation; includes deferred tax benefits of $(8,706) (Successor); $(83,000) (2015 - Successor); $47,277 (2015 - Predecessor)		(237,143)	300,814
Policyholder dividend obligation, end of period	$ 323,432	58,435	264,107
Deferred tax benefits		(83,000)	$ (8,706)
Predecessor
Entity Information [Line Items]
Policyholder dividend obligation, beginning of period	366,745	$ 500,453
Applicable to net revenue (losses)	(1,369)
Change in net unrealized investment gains (losses) allocated to the policyholder dividend obligation; includes deferred tax benefits of $(8,706) (Successor); $(83,000) (2015 - Successor); $47,277 (2015 - Predecessor)	135,077
Policyholder dividend obligation, end of period	500,453
Deferred tax benefits	$ 47,277