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Investment In Unconsolidated Affiliates (Changes In Partnership's Investment) (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	8 Months Ended	0 Months Ended	7 Months Ended	12 Months Ended	5 Months Ended	12 Months Ended	5 Months Ended	9 Months Ended	7 Months Ended	12 Months Ended	7 Months Ended	12 Months Ended
	May 02, 2011 Lone Star [Member]	Dec. 31, 2011 Lone Star [Member]	Sep. 01, 2011 MEP [Member]	Dec. 31, 2010 MEP [Member]	Dec. 31, 2011 MEP [Member]	May 25, 2010 Predecessor [Member]	Dec. 31, 2009 Predecessor [Member]	May 25, 2010 Predecessor [Member] HPC [Member]	Dec. 31, 2009 Predecessor [Member] HPC [Member]	Dec. 31, 2010 Successor [Member]	Dec. 31, 2011 Successor [Member]	Dec. 31, 2010 Successor [Member] HPC [Member]	Dec. 31, 2011 Successor [Member] HPC [Member]
Contributions	$ 592,700	$ 645,265		$ 85,828	$ 0	$ 20,210	$ 0	$ 20,210	$ 401,356	$ 85,828	$ 52,601	$ 0	$ 0
Payments to acquire additional interest in affiliates			1,200	0	1,355			75,114	52,803			0	0
Distributions received		22,037		43,306	82,512	12,446	7,886	12,446	8,926	56,903	119,236	52,668	65,465
Return of investment received		22,698						0	0			19,995	0
Share of unconsolidated affiliate net income		28,188		21,219	42,617			15,872	7,886			35,684	54,582
Amortization of excess fair value of unconsoildated affilaites						$ 0	$ 0	$ 0	$ 0	$ 3,410	$ 5,847	$ 3,410	$ 5,847

This item represents disclosure of the amount of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporation; these investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities.

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