BORROWINGS (Details 2) - USD ($)						1 Months Ended							4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 15, 2016	Sep. 14, 2016	Jun. 07, 2016	Dec. 16, 2015	May 07, 2015	Oct. 31, 2016	Aug. 31, 2016	Apr. 30, 2016	Mar. 31, 2016	Nov. 30, 2015	Jul. 31, 2015	Feb. 28, 2015	Apr. 30, 2014	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	May 31, 2016
Successor Company
Details of Company's borrowings
Collateralized loan obligation secured debt repaid														$ 1,045,041,000	$ 2,142,035,000	$ 1,672,467,000
Reduction in CLO obligations															(3,570,710,000)	(5,505,250,000)
Successor Company | Collateralized Loan Obligation Secured Notes
Details of Company's borrowings
Fair value, option, credit risk, gains (losses) on liabilities															0
Fair value, option, credit risk, unrealized gain (loss) on liabilities														$ 27,000,000
Successor Company | CLO 2007-1 secured notes
Details of Company's borrowings
Collateralized loan obligation secured debt repaid							$ 945,600,000
Derivative, notional amount terminated							$ 142,300,000
Par amount of notes issued																1,544,032,000
Successor Company | CLO 16 subordinated notes
Details of Company's borrowings
Collateralized loan obligation secured debt repaid															8,200,000
Successor Company | CLO 16 subordinated notes | Nonaffiliates
Details of Company's borrowings
Par amount of notes issued			$ 25,700,000.0
Successor Company | CLO 2007-1 subordinated notes
Details of Company's borrowings
Collateralized loan obligation secured debt repaid						$ 134,500,000
Par amount of notes issued																134,468,000
Successor Company | CLO 2005-2 senior secured notes
Details of Company's borrowings
Collateralized loan obligation secured debt repaid										$ 140,200,000
Successor Company | CLO 2005-1 senior secured notes
Details of Company's borrowings
Collateralized loan obligation secured debt repaid											$ 142,400,000
Successor Company | CLO 2005-2 Class E Secured Notes - 2
Details of Company's borrowings
Par amount of notes issued																30,000,000.0
Proceeds from senior notes																30,200,000
Successor Company | CLO 2006-1 senior secured notes
Details of Company's borrowings
Collateralized loan obligation secured debt repaid												$ 181,800,000
Derivative, notional amount terminated												$ 84,000,000
Successor Company | CLO 2007-1 mezzanine notes
Details of Company's borrowings
Collateralized loan obligation secured debt repaid																887,100,000
Successor Company | Notes CLO 2016-1
Details of Company's borrowings
Collateralized loan obligation secured debt repaid															348,400,000
Par amount of notes issued			426,400,000.0
Successor Company | CLO 16 senior secured notes | Nonaffiliates
Details of Company's borrowings
Par amount of notes issued			$ 330,900,000.0
Successor Company | CLO 16 senior secured notes | Nonaffiliates | Three Month LIBOR
Details of Company's borrowings
Percentage of margin added to reference rate to determine interest rate on debt (in percentage)			1.70%
Successor Company | CLO 2011-1 senior debt
Details of Company's borrowings
Collateralized loan obligation secured debt repaid									$ 249,300,000							153,200,000
Par amount of notes issued																249,301,000
Successor Company | CLO 2007-1 Class D and E secured notes
Details of Company's borrowings
Par amount of notes issued																35,000,000.0
Proceeds from senior notes																35,100,000
Successor Company | CLO 2013-2 secured notes
Details of Company's borrowings
Par amount of notes issued															339,250,000	339,250,000
Successor Company | CLO 9 secured notes
Details of Company's borrowings
Par amount of notes issued															463,750,000	463,750,000
Successor Company | CLO 9 subordinated notes
Details of Company's borrowings
Par amount of notes issued															15,000,000	15,000,000
Successor Company | CLO 10 senior notes
Details of Company's borrowings
Par amount of notes issued															368,000,000	368,000,000
Successor Company | CLO 11 notes
Details of Company's borrowings
Par amount of notes issued					$ 564,500,000
Successor Company | CLO 11 senior secured notes
Details of Company's borrowings
Par amount of notes issued																507,750,000
Successor Company | CLO 11 senior secured notes | Nonaffiliates
Details of Company's borrowings
Par amount of notes issued					$ 507,800,000
Successor Company | CLO 11 senior secured notes | Nonaffiliates | Three Month LIBOR
Details of Company's borrowings
Percentage of margin added to reference rate to determine interest rate on debt (in percentage)					2.06%
Successor Company | CLO 11 subordinated notes
Details of Company's borrowings
Par amount of notes issued																28,250,000
Successor Company | CLO 11 subordinated notes | Nonaffiliates
Details of Company's borrowings
Par amount of notes issued					$ 28,300,000.0
Successor Company | CLO 13 notes
Details of Company's borrowings
Par amount of notes issued				$ 412,000,000.0
Successor Company | CLO 13 secured notes
Details of Company's borrowings
Collateralized loan obligation secured debt repaid															2,000,000
Par amount of notes issued																370,000,000
Successor Company | CLO 13 secured notes | Nonaffiliates
Details of Company's borrowings
Par amount of notes issued				370,000,000.0
Floating rate senior secured note				350,000,000.0
Fixed rate senior secured note				$ 20,000,000.0
Fixed rate (as a percent)				3.83%
Successor Company | CLO 13 secured notes | Nonaffiliates | Three Month LIBOR
Details of Company's borrowings
Percentage of margin added to reference rate to determine interest rate on debt (in percentage)				2.19%
Successor Company | CLO 13 subordinated notes
Details of Company's borrowings
Par amount of notes issued																4,000,000
Successor Company | CLO 13 subordinated notes | Nonaffiliates
Details of Company's borrowings
Par amount of notes issued				$ 4,000,000.0
Successor Company | CLO 13 Class F Notes
Details of Company's borrowings
Par amount of notes issued															7,000,000.0
Proceeds from senior notes															5,900,000
Successor Company | Subordinated Notes to Affiliate
Details of Company's borrowings
Par amount of notes issued															106,500,000.0		$ 96,500,000.0
Successor Company | CLO 16 notes
Details of Company's borrowings
Par amount of notes issued	$ 711,300,000.0
Successor Company | CLO 16 secured notes
Details of Company's borrowings
Par amount of notes issued															644,300,000
Successor Company | CLO 16 secured notes | Nonaffiliates
Details of Company's borrowings
Par amount of notes issued	644,300,000.0
Floating rate senior secured note	634,800,000.0
Fixed rate senior secured note	$ 9,500,000.0
Fixed rate (as a percent)	4.80%
Successor Company | CLO 16 secured notes | Nonaffiliates | Three Month LIBOR
Details of Company's borrowings
Percentage of margin added to reference rate to determine interest rate on debt (in percentage)	2.04%
Successor Company | CLO 16 Subordinated Notes
Details of Company's borrowings
Par amount of notes issued															4,500,000
Successor Company | CLO 16 Subordinated Notes | Nonaffiliates
Details of Company's borrowings
Par amount of notes issued	$ 4,500,000.0
Successor Company | CLO 2007-A notes
Details of Company's borrowings
Collateralized loan obligation secured debt repaid								$ 15,100,000
Par amount of notes issued																$ 15,096,000
Successor Company | CLO 15 notes
Details of Company's borrowings
Par amount of notes issued		$ 410,800,000.0
Successor Company | CLO 15 secured notes
Details of Company's borrowings
Par amount of notes issued															370,500,000
Successor Company | CLO 15 secured notes | Nonaffiliates
Details of Company's borrowings
Par amount of notes issued		$ 370,500,000.0
Successor Company | CLO 15 secured notes | Nonaffiliates | Three Month LIBOR
Details of Company's borrowings
Percentage of margin added to reference rate to determine interest rate on debt (in percentage)		2.05%
Successor Company | CLO 15 subordinated notes
Details of Company's borrowings
Par amount of notes issued															12,100,000
Successor Company | CLO 15 subordinated notes | Nonaffiliates
Details of Company's borrowings
Par amount of notes issued		$ 12,100,000.0
Predecessor Company
Details of Company's borrowings
Collateralized loan obligation secured debt repaid													$ 221,914,000
Cumulative-Effect Adjustment of Deconsolidation of VIE
Details of Company's borrowings
Reduction in CLO obligations															$ 967,300,000