Consolidated Statements of Partners' Capital and Noncontrolling Interest (Successor) (USD $) In Thousands, except Share data	Total USD ($)	Successor [Member] USD ($)	Successor [Member] Common Units [Member]	Successor [Member] Common Unitholders [Member] USD ($)	Successor [Member] General Partner Interest [Member] USD ($)	Successor [Member] Accumulated Other Comprehensive Income (Loss) [Member] USD ($)	Successor [Member] Noncontrolling Interest [Member] USD ($)
Balance at May. 25, 2010		$ 2,409,932		$ 2,073,532	$ 304,950		$ 31,450
Balance - (in Units) at May. 25, 2010			93,340,428
Partners' Capital Account, Private Placement of Units		584,436		584,436
Private common unit offering, net of costs - (in Units)			26,266,791
Partners' Capital Account, Public Sale of Units		399,582		399,582
Public common unit offerings, net of costs - (in Units)			17,537,500
Issuance of common units under LTIP, net of forfeitures and tax withholding		(485)		(485)
Issuance of common units under LTIP, net of forfeitures and tax withholding - (in Units)			42,417
Proceeds from exercise of common unit options		1,937		1,937
Proceeds from exercise of common unit options - (in Units)			94,200
Unit-based compensation expenses		1,827		1,827
Acquisition of assets between entities under common control below historical cost		8,937			8,937
Partner contributions		27,999		7,193	20,806
Partner distributions		(118,630)		(114,292)	(4,338)
Contributions from noncontrolling interest		86					86
Accrued distributions to phantom units		(107)		(107)
Net income		(5,972)		(8,928)	2,800		156
Distributions to Series A convertible redeemable preferred units		(3,891)		(3,813)	(78)
Accretion of Series A convertible redeemable preferred units		(150)		(150)
Net change in fair value of cash flow hedges		(11,099)				(11,099)
Net cash flow hedge amounts reclassified to earnings		0
Balance at Dec. 31, 2010	3,294,402	3,294,402		2,940,732	333,077	(11,099)	31,692
Balance - (in Units) at Dec. 31, 2010			137,281,336
Partners' Capital Account, Units, Sale of Units			20,000,001
Partners' Capital Account, Sale of Units		435,685		435,685
Issuance of common units under LTIP, net of forfeitures and tax withholding		(109)		(109)
Issuance of common units under LTIP, net of forfeitures and tax withholding - (in Units)			156,271
Unit-based compensation expenses		3,610		3,610
Disposition of assets between entities under common control in excess of historical cost		249			249
Partner distributions		(274,488)		(264,174)	(10,314)
Contributions from noncontrolling interest		0
Accrued distributions to phantom units		(250)		(250)
Net income		73,619		65,432	7,010		1,177
Distributions to Series A convertible redeemable preferred units		(7,781)		(7,635)	(146)
Accretion of Series A convertible redeemable preferred units		(201)		(201)
Net change in fair value of cash flow hedges		(12,678)				(12,678)
Net cash flow hedge amounts reclassified to earnings		19,018				19,018
Balance at Dec. 31, 2011	$ 3,531,076	$ 3,531,076		$ 3,173,090	$ 329,876	$ (4,759)	$ 32,869
Balance - (in Units) at Dec. 31, 2011			157,437,608