INVESTMENT OPERATIONS - Schedule of Other-than-Temporary Impairments of Investments (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		5 Months Ended	6 Months Ended
	Jan. 31, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2015	Jun. 30, 2016
Successor
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairments		$ (5,527)	$ (13,395)	$ (13,395)	$ (8,296)
Non-credit impairment losses recorded in other comprehensive income		4,560	7,661	7,661	4,712
Net impairment losses recognized in earnings		$ (967)	$ (5,734)	$ (5,734)	$ (3,584)
Predecessor
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairments	$ (636)
Non-credit impairment losses recorded in other comprehensive income	155
Net impairment losses recognized in earnings	$ (481)