Partners' Capital - Summary of Preferred Units Outstanding (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Class of Stock [Line Items]
Liquidation Preference	$ 75,000	$ 225,000
Series F Preferred Units [Member]
Class of Stock [Line Items]
Preferred Units Outstanding	500	500
Liquidation Preference	50,000	50,000
Series G Preferred Units [Member]
Class of Stock [Line Items]
Preferred Units Outstanding	250	250
Liquidation Preference	25,000	25,000
Series J Preferred Units [Member]
Class of Stock [Line Items]
Preferred Units Outstanding		400
Liquidation Preference		100,000
Series K Preferred Units [Member]
Class of Stock [Line Items]
Preferred Units Outstanding		200
Liquidation Preference		$ 50,000