Fair Value of Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended																					3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2012 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]	Sep. 30, 2013 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2012 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]	Sep. 30, 2013 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2012 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]	Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 1 [Member]	Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2 [Member]	Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Estimate of Fair Value Measurement [Member]	Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Estimate of Fair Value Measurement [Member]	Sep. 30, 2013 Interest Rate Swap [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2012 Interest Rate Swap [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 1 [Member]	Sep. 30, 2013 Interest Rate Swap [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2012 Interest Rate Swap [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2 [Member]	Sep. 30, 2013 Interest Rate Swap [Member] Fair Value, Measurements, Recurring [Member] Estimate of Fair Value Measurement [Member]	Dec. 31, 2012 Interest Rate Swap [Member] Fair Value, Measurements, Recurring [Member] Estimate of Fair Value Measurement [Member]	Sep. 30, 2012 Assets, Discontinued Operations [Member] Fair Value, Measurements, Nonrecurring [Member]	Sep. 30, 2012 Assets, Discontinued Operations [Member] Fair Value, Measurements, Nonrecurring [Member]	Sep. 30, 2013 Property and equipment [Member] Fair Value, Measurements, Nonrecurring [Member]	Sep. 30, 2012 Property and equipment [Member] Fair Value, Measurements, Nonrecurring [Member]	Sep. 30, 2013 Property and equipment [Member] Fair Value, Measurements, Nonrecurring [Member]	Sep. 30, 2012 Property and equipment [Member] Fair Value, Measurements, Nonrecurring [Member]	Sep. 30, 2013 Equity Method Investments [Member] Fair Value, Measurements, Nonrecurring [Member]	Sep. 30, 2012 Equity Method Investments [Member] Fair Value, Measurements, Nonrecurring [Member]	Sep. 30, 2013 Equity Method Investments [Member] Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets of Disposal Group, Including Discontinued Operation, Current			$ 791	$ 794		$ 794		$ 0		$ 0
Fair Value, Nonrecurring Basis, Asset, Gain (Loss) Included in Earnings	8,708	30,690																					0	15,700	0	8,708	1,721	13,744	1,200	0	1,246
Equity Method Investments			96,764	94,227		0		0		0
Finite-Lived Intangible Assets, Net			183,979	171,584
Property and equipment, net			193,975	186,617	0	0	0	0	0	0
Financial Assets:
Cash and cash equivalents											135,557	148,858	0	0	135,557	148,858
Restricted cash											0	0	16,390	22,117	16,390	22,117
Equity securities											21,885	22,168	0	0	21,885	22,168
Total Financial Assets						794		0		0	157,442	171,026	16,390	22,117	173,832	193,143
Financial Liabilities:
Total debt											0	0	824,099	899,258	824,099	899,258
Total Financial Liabilities											0	0	824,099	899,258	824,099	899,258
Interest rate swap agreements																	$ 0	$ 0	$ (4,455)	$ (6,486)	$ (4,455)	$ 6,486