Income (Loss) Per Limited Partner Unit (Basic And Diluted Income (Loss) From Continuing Operations) (Details) (USD $) In Thousands, except Share data, unless otherwise specified					7 Months Ended	12 Months Ended					5 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2008 Class D Common Units [Member]	Jan. 15, 2008 Class D Common Units [Member]	Dec. 31, 2010 Successor [Member]	Dec. 31, 2011 Successor [Member]	Dec. 31, 2011 Successor [Member] Common Unit Options [Member]	Dec. 31, 2011 Successor [Member] Phantom Units [Member]	Dec. 31, 2011 Successor [Member] Series A Preferred Units [Member]	Dec. 31, 2011 Successor [Member] Class D Common Units [Member]	May 25, 2010 Predecessor [Member]	Dec. 31, 2009 Predecessor [Member]	Dec. 31, 2009 Predecessor [Member] Common Unit Options [Member]	Dec. 31, 2009 Predecessor [Member] Phantom Units [Member]	Dec. 31, 2009 Predecessor [Member] Series A Preferred Units [Member]	Dec. 31, 2009 Predecessor [Member] Class D Common Units [Member]
Amount allocated to common units					$ (12,359)	$ 57,450					$ (8,966)	$ 131,752
Dilutive Securities, Effect on Basic Earnings Per Share, Other							19,192	148,388	4,632,389	0			0	100,764	0	797,425
Diluted income from continuing operations amount						47,459						132,572
Basic income from continuing operations units					130,619,554	145,490,869					92,788,319	80,582,705
Income Allocated to Dilutive Securities							$ 0	$ 0	$ (9,991)	$ 0			$ 0	$ 0	$ 0	$ 820
Diluted income from continuing operations units						150,290,838						81,480,894
Basic and diluted income from continuing operations per common unit						$ 0.39						$ 1.63
Diluted income from continuing operations per common unit						$ 0.32						$ 1.63
Limited Partners' Capital account, units issued	157,437,608	137,281,336		7,276,506
Sales price per unit at commitment date			$ 30.18
Discount from fair value of Partnership's common units at commitment date			$ 1.10