Partnership's Borrowings Through Consolidated CLO Vehicles (Detail) - Entity [Domain] - Partnership's Borrowings Through Consolidated CLO Vehicles - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Borrowing Outstanding		$ 3,094,233	$ 7,334,316
Senior Secured Notes
Debt Instrument [Line Items]
Borrowing Outstanding		$ 2,912,753	$ 6,594,266
Weighted Average Interest Rate		1.94%	1.27%
Weighted Average Remaining Maturity in Years		4 years 6 months	3 years 9 months 18 days
Subordinated Notes
Debt Instrument [Line Items]
Borrowing Outstanding		$ 181,480	$ 740,050
Weighted Average Interest Rate	[1]

[1] The Subordinated Notes do not have contractual interest rates but instead receive distributions from the excess cash flows of the CLO vehicles.