Debt and Other Obligations (Components of Interest Expense and Amortization of Deferred Financing Costs) (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Debt and Other Obligations [Abstract]
Interest expense on debt obligations	$ 113,007,000	$ 100,885,000
Amortization of deferred financing costs	4,812,000	3,722,000
Amortization of adjustments on long-term debt	3,763,000	3,865,000
Amortization of interest rate swaps	16,338,000	17,889,000
Other	(448,000)	325,000
Total	$ 137,472,000	$ 126,686,000