Income Taxes (Components Of Net Deferred Income Tax Asset And Liability) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Schedule of Deferred Tax Assets and Liabilities [Line Items]
Current deferred tax assets, Allowance for doubtful accounts	$ 241		$ 648	[1]
Current deferred tax assets, Deferred revenue	35,970		30,237	[1]
Current deferred tax assets, Accrued liabilities	14,862		4,891	[1]
Current deferred tax assets, Valuation allowance	(21,187)		(15,374)	[1]
Current deferred tax assets, Total current deferred tax assets, net	29,886	[2]	20,402	[1],[2]
Noncurrent deferred tax assets, Net operating losses	438,608		436,083	[1]
Noncurrent deferred tax assets, Property, equipment & intangible basis differences	47,602		46,357	[1]
Noncurrent deferred tax assets, Accrued liabilities	26,087		15,259	[1]
Noncurrent deferred tax assets, Non-cash compensation	8,582		7,448	[1]
Noncurrent deferred tax assets, Valuation allowance	(225,339)		(218,310)	[1]
Noncurrent deferred tax assets, Other	2,527		5,081	[1]
Total noncurrent deferred tax assets	298,067	[3]	291,918	[1],[3]
Noncurrent deferred tax liabilities, Property, equipment & intangible basis differences	(339,037)		(318,446)	[1]
Noncurrent deferred tax liabilities, Convertible debt instruments	(2,006)		(3,660)	[1]
Noncurrent deferred tax liabilities, Straight-line Rents	(17,463)		(4,259)	[1]
Noncurrent deferred tax liabilities, Other	(8,079)		(6,631)	[1]
Total noncurrent deferred tax liabilities, net	(68,518)	[3]	(41,078)	[1],[3]
Other Assets [Member]
Schedule of Deferred Tax Assets and Liabilities [Line Items]
Total noncurrent deferred tax assets	232		148
Other Long-Term Liabilities [Member]
Schedule of Deferred Tax Assets and Liabilities [Line Items]
Total noncurrent deferred tax assets	$ (68,750)		$ (41,225)

[1] The prior year amounts reflect a recast of the valuation allowance.

[2] Amounts are included in Prepaid and other current assets on the Consolidated Balance Sheets.

[3] Of these amounts, $232 and $(68,750) are included in the Other assets and Other long-term liabilities, respectively on the accompanying Consolidated Balance Sheets as of December 31, 2013. As of December 31, 2012, $148 and $(41,225) are included in the Other assets and Other long-term liabilities on the accompanying Consolidated Balance Sheet.