INVESTMENT OPERATIONS - Schedule of Other-than-Temporary Impairments of Investments (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended				11 Months Ended	12 Months Ended
	Jan. 31, 2015	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2014
Successor
Investment [Line Items]
Other-than-temporary impairments						$ (28,659)	$ (32,075)
Non-credit impairment losses recorded in other comprehensive income						1,666	14,327
Net impairment losses recognized in earnings		$ (10,856)	$ (3,308)	$ (967)	$ (2,617)	$ (26,993)	$ (17,748)
Predecessor
Investment [Line Items]
Other-than-temporary impairments	$ (636)							$ (2,589)
Non-credit impairment losses recorded in other comprehensive income	155							(4,686)
Net impairment losses recognized in earnings	$ (481)							$ (7,275)