Debt and Other Obligations Retirement of Long-term Obligations (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015		Sep. 30, 2014
Extinguishment of Debt [Line Items]
Write-off of deferred financing costs and discounts				$ 4,200
Extinguishment of Debt, Amount				1,069,361
Repayments of Other Long-term Debt				1,069,337	[1]	$ 836,899
Gains (Losses) on Extinguishment of Debt		$ 0	$ 0	(4,157)	[2]	$ (44,629)
Fixed Rate Securitized Debt August 2010 Tower Revenue Notes [Member]
Extinguishment of Debt [Line Items]
Extinguishment of Debt, Amount				250,000
Repayments of Other Long-term Debt	[1]			250,000
Gains (Losses) on Extinguishment of Debt	[2]			(159)
WCP Securitized Notes [Member]
Extinguishment of Debt [Line Items]
Extinguishment of Debt, Amount				252,830
Repayments of Other Long-term Debt	[1]			252,830
Gains (Losses) on Extinguishment of Debt	[2]			2,105
Term Loans Tranche B - Due 2019 [Member]
Extinguishment of Debt [Line Items]
Extinguishment of Debt, Amount				564,137
Repayments of Other Long-term Debt	[1]			564,137
Gains (Losses) on Extinguishment of Debt	[2]			(6,127)
Other Debt Obligations [Member]
Extinguishment of Debt [Line Items]
Extinguishment of Debt, Amount				2,394
Repayments of Other Long-term Debt	[1]			2,370
Gains (Losses) on Extinguishment of Debt	[2]			$ 24

[1] Exclusive of accrued interest.

[2] Inclusive of $4.2 million related to the net write off of deferred financing costs, premiums and discounts.