Debt and Other Obligations (Components of Interest Expense and Amortization of Deferred Financing Costs) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Debt and Other Obligations
Interest expense on debt obligations	$ 100,802,000	$ 101,666,000	$ 201,687,000	$ 203,576,000
Amortization of deferred financing costs	3,754,000	3,986,000	7,476,000	7,880,000
Amortization of discounts on long-term debt	3,968,000	3,571,000	7,833,000	7,050,000
Amortization of interest rate swaps	17,959,000	10,836,000	35,848,000	21,825,000
Other	0	286,000	325,000	795,000
Total	$ 126,483,000	$ 120,345,000	$ 253,169,000	$ 241,126,000