Debt and Other Obligations (Components of Interest Expense and Amortization of Deferred Financing Costs) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Debt and Other Obligations
Interest expense on debt obligations	$ 101,380,000	$ 101,012,000	$ 303,067,000	$ 304,588,000
Amortization of deferred financing costs	3,790,000	3,825,000	11,266,000	11,705,000
Amortization of discounts on long-term debt	4,074,000	3,666,000	11,907,000	10,716,000
Amortization of interest rate swaps	17,986,000	14,400,000	53,834,000	36,225,000
Other	(111,000)	293,000	214,000	1,088,000
Total	$ 127,119,000	$ 123,196,000	$ 380,288,000	$ 364,322,000