Debt and Other Obligations Retirement of Long-term Obligations (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016		Jun. 30, 2015
Extinguishment of Debt [Line Items]
Write-off of deferred financing costs and discounts				$ 32,000
Extinguishment of Debt, Amount				3,526,390
Repayments of Other Long-term Debt				3,536,362	[1]	$ 1,069,337
Gains (losses) on retirement of long-term obligations		$ (11,468)	$ (4,181)	(42,017)	[2]	$ (4,157)
Variable Rate Revolver 2012 [Member]
Extinguishment of Debt [Line Items]
Extinguishment of Debt, Amount	[3]			0
Repayments of Other Long-term Debt	[1],[3]			0
Gains (losses) on retirement of long-term obligations	[2],[3]			(1,930)
Variable Rate 2012 Term Loans Tranche A [Member]
Extinguishment of Debt [Line Items]
Extinguishment of Debt, Amount				629,375
Repayments of Other Long-term Debt	[1]			629,375
Gains (losses) on retirement of long-term obligations	[2]			(1,498)
Variable Rate 2012 Term Loans Tranche B [Member]
Extinguishment of Debt [Line Items]
Extinguishment of Debt, Amount				2,247,015
Repayments of Other Long-term Debt	[1]			2,247,015
Gains (losses) on retirement of long-term obligations	[2]			(27,122)
Fixed Rate Securitized Debt January 2010 Tower Revenue Notes Second Tranche [Member]
Extinguishment of Debt [Line Items]
Extinguishment of Debt, Amount				350,000
Repayments of Other Long-term Debt	[1]			352,796
Gains (losses) on retirement of long-term obligations	[2]			(3,338)
Fixed Rate Securitized Debt August 2010 Tower Revenue Notes Second Tranche [Member]
Extinguishment of Debt [Line Items]
Extinguishment of Debt, Amount				300,000
Repayments of Other Long-term Debt	[1]			307,176
Gains (losses) on retirement of long-term obligations	[2]			$ (8,129)

[1] Exclusive of accrued interest.

[2] Inclusive of $32.0 million related to the write off of deferred financing costs.

[3] See discussion of the repayment of the Company's 2012 Credit Facility above.