Partners' Capital - General Partnership and Limited Partnership Units Outstanding, Including Unvested General Partner Restricted Units (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
General Partnership and Limited Partnership Units Outstanding [Roll Forward]
Balance	103,470,254	92,044,769	74,204,447
Issuance of General Partner Units	10,853,693	11,085,905	17,646,586
Issuance of General Partner Restricted Units	284,461	565,137	292,339
Repurchase and Retirement of Restricted Units	(30,245)	(225,557)	(98,603)
Balance	114,578,163	103,470,254	92,044,769