Condensed Consolidated Statements Of Changes In Partners' Capital (USD $) In Thousands	Total	Limited Partners Common	Limited Partners Subordinated	Limited Partners Class B	Limited Partners Class C	General Partner	Noncontrolling Interest
Beginning Balance at Dec. 31, 2012	$ 3,796,506	$ 2,188,241	$ 834,001	$ 273,858	$ 295,551	$ 93,182	$ 111,673
Net income	210,334	107,513	54,479	11,212	10,386	23,378	3,366
Distribution to unitholders	(275,199)	(146,447)	(96,879)		(15,707)	(16,166)
Conversion of subordinated units to common units		791,601	(791,601)
Contributions from noncontrolling interest owners	105,891						105,891
Non-cash equity based compensation	4,986	4,986
Issuance of common units	399,812	399,812
Issuance of general partner interests	8,842					8,842
Beneficial conversion feature of Class B units		720		(720)
Amortization of beneficial conversion feature of Class B and Class C units		(45,030)		20,753	24,277
Ending Balance at Sep. 30, 2013	$ 4,251,172	$ 3,301,396		$ 305,103	$ 314,507	$ 109,236	$ 220,930