Summary Of Significant Accounting Policies (Composition Of Intangible And Other Long-term Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule of Intangible Assets by Major Class [Line Items]
Gross Amount	$ 563,554	$ 950,756
Accumulated Amortization	(53,148)	(20,620)
Net Balance	510,406	930,136
Deferred Compensation Plan Assets [Member]
Schedule of Intangible Assets by Major Class [Line Items]
Gross Amount	11,343	10,598
Accumulated Amortization
Net Balance	11,343	10,598
Escrowed Cash [Member]
Schedule of Intangible Assets by Major Class [Line Items]
Gross Amount	50,304	50,196
Accumulated Amortization
Net Balance	50,304	50,196
Restricted Cash [Member]
Schedule of Intangible Assets by Major Class [Line Items]
Gross Amount		785,280
Accumulated Amortization
Net Balance		785,280
Long Term Assets Held as Major Replacement Spares [Member]
Schedule of Intangible Assets by Major Class [Line Items]
Gross Amount	7,241	13,806
Accumulated Amortization
Net Balance	7,241	13,806
Customer Relationships [Member]
Schedule of Intangible Assets by Major Class [Line Items]
Gross Amount	348,160	23,707
Accumulated Amortization	(25,357)	(6,144)
Net Balance	322,803	17,563
Trade Names [Member]
Schedule of Intangible Assets by Major Class [Line Items]
Gross Amount	53,063	18,005
Accumulated Amortization	(7,017)	(2,706)
Net Balance	46,046	15,299
Noncompete Agreements [Member]
Schedule of Intangible Assets by Major Class [Line Items]
Gross Amount	2,938	1,697
Accumulated Amortization	(1,062)	(1,126)
Net Balance	1,876	571
Debt Issuance Costs [Member]
Schedule of Intangible Assets by Major Class [Line Items]
Gross Amount	63,829	41,449
Accumulated Amortization	(18,948)	(10,039)
Net Balance	44,881	31,410
Other Intangible Assets [Member]
Schedule of Intangible Assets by Major Class [Line Items]
Gross Amount	26,676	6,018
Accumulated Amortization	(764)	(605)
Net Balance	$ 25,912	$ 5,413