BORROWINGS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Nov. 15, 2016	Nov. 01, 2016
Details of Company's borrowings
Carrying value	$ 3,087,941,000	$ 4,843,746,000
8.375% Senior notes
Details of Company's borrowings
Stated interest rate		8.375%
7.500% Senior notes
Details of Company's borrowings
Stated interest rate	7.50%	7.50%
Junior subordinated notes
Details of Company's borrowings
Total borrowings, carrying value	$ 283,500,000
Successor Company
Details of Company's borrowings
Total borrowings	3,626,191,000	$ 5,540,207,000
Total borrowings, carrying value	3,570,710,000	5,505,250,000
Collateral amount	3,164,156,000	5,169,916,000
Successor Company | CLO 2007-1 secured notes
Details of Company's borrowings
Par		1,544,032,000
Carrying value		$ 1,630,293,000
Weighted Average Borrowing Rate (as a percent)		2.10%
Weighted Average Remaining Maturity (in days)		1962 days
Collateral amount		$ 1,732,855,000
Successor Company | CLO 2007-1 subordinated notes
Details of Company's borrowings
Par		134,468,000
Carrying value		$ 74,954,000
Weighted Average Borrowing Rate (as a percent)		11.66%
Weighted Average Remaining Maturity (in days)		1962 days
Collateral amount		$ 150,912,000
Successor Company | CLO 2007-A notes
Details of Company's borrowings
Par		15,096,000
Carrying value		$ 17,060,000
Weighted Average Borrowing Rate (as a percent)		14.49%
Weighted Average Remaining Maturity (in days)		654 days
Collateral amount		$ 48,856,000
Successor Company | CLO 2011-1 senior debt
Details of Company's borrowings
Par		249,301,000
Carrying value		$ 249,301,000
Weighted Average Borrowing Rate (as a percent)		1.67%
Weighted Average Remaining Maturity (in days)		1689 days
Collateral amount		$ 310,498,000
Successor Company | CLO 2012-1 secured notes
Details of Company's borrowings
Par	367,500,000	367,500,000
Carrying value	$ 378,978,000	$ 365,383,000
Weighted Average Borrowing Rate (as a percent)	3.01%	2.59%
Weighted Average Remaining Maturity (in days)	2906 days	3272 days
Collateral amount	$ 333,931,000	$ 361,684,000
Successor Company | CLO 2012-1 subordinated notes
Details of Company's borrowings
Par	18,000,000	18,000,000
Carrying value	$ 9,613,000	$ 10,845,000
Weighted Average Borrowing Rate (as a percent)	15.40%	15.82%
Weighted Average Remaining Maturity (in days)	2906 days	3272 days
Collateral amount	$ 16,356,000	$ 17,715,000
Successor Company | CLO 2012-1 subordinated notes to affiliates
Details of Company's borrowings
Par	19,663,000
Carrying value	$ 10,501,000
Weighted Average Borrowing Rate (as a percent)	0.00%
Weighted Average Remaining Maturity (in days)	2906 days
Collateral amount	$ 17,867,000
Successor Company | CLO 2013-1 secured notes
Details of Company's borrowings
Par	458,500,000	458,500,000
Carrying value	$ 470,354,000	$ 450,280,000
Weighted Average Borrowing Rate (as a percent)	2.59%	2.05%
Weighted Average Remaining Maturity (in days)	3118 days	3484 days
Collateral amount	$ 450,836,000	$ 479,391,000
Successor Company | CLO 2013-1 subordinated notes to affiliates
Details of Company's borrowings
Par	23,063,000
Carrying value	$ 14,970,000
Weighted Average Borrowing Rate (as a percent)	0.00%
Weighted Average Remaining Maturity (in days)	3118 days
Collateral amount	$ 22,678,000
Successor Company | CLO 2013-2 secured notes
Details of Company's borrowings
Par	339,250,000	339,250,000
Carrying value	$ 343,208,000	$ 334,187,000
Weighted Average Borrowing Rate (as a percent)	2.88%	2.52%
Weighted Average Remaining Maturity (in days)	3310 days	3676 days
Collateral amount	$ 323,644,000	$ 347,989,000
Successor Company | CLO 2013-2 subordinated notes to affiliates
Details of Company's borrowings
Par	30,959,000
Carrying value	$ 19,074,000
Weighted Average Borrowing Rate (as a percent)	0.00%
Weighted Average Remaining Maturity (in days)	3310 days
Collateral amount	$ 29,535,000
Successor Company | CLO 9 secured notes
Details of Company's borrowings
Par	463,750,000	463,750,000
Carrying value	$ 471,824,000	$ 454,103,000
Weighted Average Borrowing Rate (as a percent)	2.89%	2.33%
Weighted Average Remaining Maturity (in days)	3575 days	3941 days
Collateral amount	$ 437,048,000	$ 463,574,000
Successor Company | CLO 9 subordinated notes
Details of Company's borrowings
Par	15,000,000	15,000,000
Carrying value	$ 10,170,000	$ 9,972,000
Weighted Average Borrowing Rate (as a percent)	15.58%	15.92%
Weighted Average Remaining Maturity (in days)	3575 days	3941 days
Collateral amount	$ 14,136,000	$ 14,994,000
Successor Company | CLO 9 subordinated notes to affiliates
Details of Company's borrowings
Par	33,400,000
Carrying value	$ 22,646,000
Weighted Average Borrowing Rate (as a percent)	6.11%
Weighted Average Remaining Maturity (in days)	3575 days
Collateral amount	$ 31,477,000
Successor Company | CLO 10 senior notes
Details of Company's borrowings
Par	368,000,000	368,000,000
Carrying value	$ 377,369,000	$ 363,977,000
Weighted Average Borrowing Rate (as a percent)	3.18%	2.75%
Weighted Average Remaining Maturity (in days)	3271 days	3637 days
Collateral amount	$ 356,393,000	$ 384,991,000
Successor Company | CLO 10 subordinated notes to affiliates
Details of Company's borrowings
Par	39,146,000
Carrying value	$ 22,416,000
Weighted Average Borrowing Rate (as a percent)	7.53%
Weighted Average Remaining Maturity (in days)	3271 days
Collateral amount	$ 37,912,000
Successor Company | CLO 11 senior secured notes
Details of Company's borrowings
Par		507,750,000
Carrying value		$ 491,699,000
Weighted Average Borrowing Rate (as a percent)		2.38%
Weighted Average Remaining Maturity (in days)		4123 days
Collateral amount		$ 501,286,000
Successor Company | CLO 11 subordinated notes
Details of Company's borrowings
Par		28,250,000
Carrying value		$ 23,306,000
Weighted Average Borrowing Rate (as a percent)		5.28%
Weighted Average Remaining Maturity (in days)		4123 days
Collateral amount		$ 27,890,000
Successor Company | CLO 13 secured notes
Details of Company's borrowings
Par		370,000,000
Carrying value		$ 364,986,000
Weighted Average Borrowing Rate (as a percent)		2.84%
Weighted Average Remaining Maturity (in days)		4399 days
Collateral amount		$ 323,781,000
Successor Company | CLO 13 subordinated notes
Details of Company's borrowings
Par		4,000,000
Carrying value		$ 3,400,000
Weighted Average Borrowing Rate (as a percent)		0.00%
Weighted Average Remaining Maturity (in days)		4399 days
Collateral amount		$ 3,500,000
Successor Company | CLO 15 secured notes
Details of Company's borrowings
Par	370,500,000
Carrying value	$ 370,632,000
Weighted Average Borrowing Rate (as a percent)	3.06%
Weighted Average Remaining Maturity (in days)	4309 days
Collateral amount	$ 376,971,000
Successor Company | CLO 15 subordinated notes
Details of Company's borrowings
Par	12,100,000
Carrying value	$ 11,430,000
Weighted Average Borrowing Rate (as a percent)	0.00%
Weighted Average Remaining Maturity (in days)	4309 days
Collateral amount	$ 12,311,000
Successor Company | CLO 16 secured notes
Details of Company's borrowings
Par	644,300,000
Carrying value	$ 640,386,000
Weighted Average Borrowing Rate (as a percent)	3.16%
Weighted Average Remaining Maturity (in days)	4403 days
Collateral amount	$ 596,916,000
Successor Company | CLO 16 Subordinated Notes
Details of Company's borrowings
Par	4,500,000
Carrying value	$ 3,977,000
Weighted Average Borrowing Rate (as a percent)	0.00%
Weighted Average Remaining Maturity (in days)	4403 days
Collateral amount	$ 4,169,000
Successor Company | Collaterized loan obligation secured notes
Details of Company's borrowings
Par	3,207,631,000	4,882,897,000
Carrying value	3,177,548,000	4,843,746,000
Collateral amount	3,062,180,000	5,169,916,000
Successor Company | CLO 17 Warehouse Facility
Details of Company's borrowings
Maximum borrowing capacity				$ 200,000,000.0
Successor Company | CLO Warehouse Facility
Details of Company's borrowings
Par	20,000,000
Carrying value	$ 20,000,000
Weighted Average Borrowing Rate (as a percent)	2.25%
Weighted Average Remaining Maturity (in days)	305 days
Collateral amount	$ 101,976,000
Successor Company | 8.375% Senior notes
Details of Company's borrowings
Par		258,750,000	$ 258,800,000.0
Carrying value		$ 289,660,000
Weighted Average Borrowing Rate (as a percent)		8.38%
Weighted Average Remaining Maturity (in days)		9451 days
Stated interest rate			8.375%
Successor Company | 7.500% Senior notes
Details of Company's borrowings
Par	115,043,000	$ 115,043,000
Carrying value	$ 123,008,000	$ 123,346,000
Weighted Average Borrowing Rate (as a percent)	7.50%	7.50%
Weighted Average Remaining Maturity (in days)	9210 days	9576 days
Successor Company | Junior subordinated notes
Details of Company's borrowings
Par	$ 283,517,000	$ 283,517,000
Carrying value	$ 250,154,000	$ 248,498,000
Weighted Average Borrowing Rate (as a percent)	3.34%	5.43%
Weighted Average Remaining Maturity (in days)	7218 days	7584 days