BORROWINGS (Details 2) - USD ($)					1 Months Ended		3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended	12 Months Ended
	May. 07, 2015	Dec. 18, 2014	Sep. 16, 2014	Jan. 23, 2014	Jul. 31, 2015	Feb. 28, 2015	Sep. 30, 2015	Sep. 30, 2014	Apr. 30, 2014	Sep. 30, 2014	Sep. 30, 2015	Dec. 31, 2014
Successor Company
Details of Company's borrowings
Collateralized loan obligation secured debt repaid										$ 778,866,000	$ 1,445,941,000
Successor Company | Collateralized Loan Obligation Secured Notes
Details of Company's borrowings
Fair value, option, credit risk, gains (losses) on liabilities							$ 0				0
Fair value, option, credit risk, unrealized gain (loss) on liabilities								$ 1,500,000		1,800,000
Successor Company | CLO 2005-1 secured notes
Details of Company's borrowings
Collateralized loan obligation secured debt repaid					$ 142,400,000
Par amount of notes issued												$ 192,384,000
Successor Company | CLO 2005-2 Class E Secured Notes - 1
Details of Company's borrowings
Par amount of notes issued							15,000,000.0				15,000,000.0
Proceeds from senior notes							15,100,000
Successor Company | CLO 2005-2 Class E Secured Notes - 2
Details of Company's borrowings
Par amount of notes issued							30,000,000.0				30,000,000.0
Proceeds from senior notes											30,200,000
Successor Company | CLO 2006-1 senior secured notes
Details of Company's borrowings
Derivative, Notional Amount, Terminated						$ 84,000,000
Collateralized loan obligation secured debt repaid						$ 181,800,000
Par amount of notes issued												166,841,000
Successor Company | CLO 2006-1 Class E Secured Notes
Details of Company's borrowings
Par amount of notes issued								15,000,000.0		15,000,000.0
Proceeds from senior notes										15,000,000
Successor Company | CLO 2007-A senior secured an junior secured mezzanine notes
Details of Company's borrowings
Collateralized loan obligation secured debt repaid												494,900,000
Successor Company | Senior Notes Legacy CLO
Details of Company's borrowings
Collateralized loan obligation secured debt repaid							583,600,000	104,400,000	$ 182,600,000	301,300,000	1,100,000,000
Successor Company | CLO 2011-1 senior debt
Details of Company's borrowings
Collateralized loan obligation secured debt repaid							119,300,000	46,600,000		46,600,000	150,100,000
Par amount of notes issued							252,398,000				252,398,000	402,515,000
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				35,000,000.0
Proceeds from senior notes											35,100,000
Successor Company | CLO 2007-1 Class E secured notes
Details of Company's borrowings
Par amount of notes issued								$ 37,500,000.0		37,500,000.0
Proceeds from senior notes										$ 37,600,000
Successor Company | CLO 2013-2 secured notes
Details of Company's borrowings
Par amount of notes issued							339,250,000				339,250,000	339,250,000
Successor Company | CLO 9 notes
Details of Company's borrowings
Par amount of notes issued			$ 518,000,000.0
Successor Company | CLO 9 secured notes
Details of Company's borrowings
Par amount of notes issued			$ 463,800,000.0				463,750,000				463,750,000	463,750,000
Successor Company | CLO 9 secured notes | LIBOR
Details of Company's borrowings
Percentage of margin added to reference rate to determine interest rate on debt (in percentage)			2.01%
Successor Company | CLO 9 subordinated notes
Details of Company's borrowings
Par amount of notes issued			$ 15,000,000.0				15,000,000				15,000,000	15,000,000
Successor Company | CLO 10 notes
Details of Company's borrowings
Par amount of notes issued		$ 415,600,000.0
Successor Company | CLO 10 senior notes
Details of Company's borrowings
Par amount of notes issued		$ 368,000,000.0					368,000,000				368,000,000	$ 368,000,000
Fixed rate (as a percent)		4.90%
Successor Company | CLO 10 senior notes | Nonaffiliates
Details of Company's borrowings
Floating rate senior secured note		$ 343,000,000.0
Percentage of margin added to reference rate to determine interest rate on debt (in percentage)		2.09%
Fixed rate senior secured note		$ 25,000,000.0
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				507,750,000
Successor Company | CLO 11 senior secured notes | Nonaffiliates
Details of Company's borrowings
Par amount of notes issued	$ 507,800,000
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				$ 28,250,000
Successor Company | CLO 11 subordinated notes | Nonaffiliates
Details of Company's borrowings
Par amount of notes issued	$ 28,300,000.0
Predecessor Company
Details of Company's borrowings
Collateralized loan obligation secured debt repaid									221,914,000
Predecessor Company | CLO 2005-1 Class D - F secured notes
Details of Company's borrowings
Par amount of notes issued									72,000,000.0
Proceeds from senior notes									71,500,000
Predecessor Company | CLO 2007-A Class D and E secured notes
Details of Company's borrowings
Par amount of notes issued									61,100,000.0
Proceeds from senior notes									61,300,000
Predecessor Company | CLO 2011-1 senior debt
Details of Company's borrowings
Collateralized loan obligation secured debt repaid									39,400,000
Predecessor Company | CLO 2007-1 Class E secured notes
Details of Company's borrowings
Par amount of notes issued									21,900,000.0
Proceeds from senior notes									21,900,000
Predecessor Company | CLO 2007-A Class G secured notes
Details of Company's borrowings
Par amount of notes issued									29,800,000.0
Proceeds from senior notes									30,200,000
Predecessor Company | CLO 2007-A Class H secured notes
Details of Company's borrowings
Par amount of notes issued									29,800,000.0
Proceeds from senior notes									$ 30,100,000
Predecessor Company | CLO 2013-2 secured notes
Details of Company's borrowings
Par amount of notes issued				$ 384,000,000.0
Predecessor Company | CLO 2013-2 secured notes | Nonaffiliates
Details of Company's borrowings
Par amount of notes issued				339,300,000.0
Floating rate senior secured note				$ 319,300,000.0
Debt, variable interest rate basis				three-month LIBOR
Fixed rate senior secured note				$ 20,000,000.0
Fixed rate (as a percent)				3.74%
Predecessor Company | CLO 2013-2 secured notes | Nonaffiliates | LIBOR
Details of Company's borrowings
Percentage of margin added to reference rate to determine interest rate on debt (in percentage)				2.16%