Intangible Assets (Schedule of Finite-Lived Intangible Assets by Major Class) (Details) (USD $)	12 Months Ended			5 Months Ended					7 Months Ended	12 Months Ended	7 Months Ended	12 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2011 Customer Relations [Member] years	Dec. 31, 2011 Trade Names [Member] years	May 25, 2010 Predecessor [Member]	May 25, 2010 Predecessor [Member] Contracts [Member]	May 25, 2010 Predecessor [Member] Customer Relations [Member]	May 25, 2010 Predecessor [Member] Trade Names [Member]	May 25, 2010 Predecessor [Member] Permits and Licenses [Member]	Dec. 31, 2010 Successor [Member]	Dec. 31, 2011 Successor [Member]	Dec. 31, 2010 Successor [Member] Customer Relations [Member]	Dec. 31, 2011 Successor [Member] Customer Relations [Member]	Dec. 31, 2010 Successor [Member] Trade Names [Member]	Dec. 31, 2011 Successor [Member] Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Net finite-lived intangible assets, beginning of period	$ 770,155,000			$ 197,294,000	$ 126,332,000	$ 35,362,000	$ 30,508,000	$ 5,092,000	$ 666,360,000	$ 770,155,000	$ 600,860,000	$ 706,566,000	$ 65,500,000	$ 63,589,000
Additions									119,379,000		119,379,000		0
Amortization				(5,328,000)	(3,322,000)	(817,000)	(975,000)	(214,000)	(15,584,000)	(29,272,000)	(13,673,000)	(25,998,000)	(1,911,000)	(3,274,000)
Net finite-lived intangible assets, end of period	740,883,000			191,966,000	123,010,000	34,545,000	29,533,000	4,878,000	770,155,000	740,883,000	706,566,000	680,568,000	63,589,000	60,315,000
Finite-Lived Intangible Assets, Future Amortization [Abstract]
Average remaining amortization periods, years		26	18
Future annual amortization of finite intangible assets	$ 29,300,000