Borrowings - Partnership's Borrowings (Additional Information) (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Senior Credit Facility Term Loan Due 5/05/2020
Borrowings [Line Items]
Loan maturity	May 05, 2020	May 05, 2020
CLO Term Loan
Borrowings [Line Items]
Loan maturity	Sep. 28, 2018	Sep. 28, 2018
3.875% senior notes due 2023
Borrowings [Line Items]
Loan maturity	Feb. 01, 2023	Feb. 01, 2023
Interest rate on senior notes (as a percent)	3.875%	3.875%	3.875%
5.625% senior notes due 2043
Borrowings [Line Items]
Loan maturity	Mar. 30, 2043	Mar. 30, 2043
Interest rate on senior notes (as a percent)	5.625%	5.625%	5.625%