DEBT AND OTHER OBLIGATIONS - Repurchase Program Borrowings (Details) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended	11 Months Ended
	Jan. 31, 2015	Jun. 30, 2016	Dec. 31, 2015
Maximum | Repurchase Program Borrowings
Debt Instrument [Line Items]
Term of financing agreement		90 days
Successor
Debt Instrument [Line Items]
Repurchase program borrowings		$ 160,000	$ 438,185
Successor | Repurchase Program Borrowings
Debt Instrument [Line Items]
Fair value of securities pledged under the repurchase program		177,500	479,900
Repurchase program borrowings		$ 160,000	438,200
Average borrowing rate (as a percent)		0.42%
Maximum outstanding balance		$ 725,000	912,700
Average daily balance		$ 464,500	$ 540,300
Average borrowing rate (as a percent)		0.40%	0.20%
Predecessor | Repurchase Program Borrowings
Debt Instrument [Line Items]
Average daily balance	$ 77,400
Average borrowing rate (as a percent)	0.16%