Impairment and Other Charges (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]
Wireless license impairment	$ 0	$ 0	$ 377,000
Property and equipment, impairment loss	19,847,000	13,640,000	0
Post-acquisition charges	0	0	26,393,000
Impairments and other charges	28,783,000	39,399,000	26,770,000
Certain capitalized construction in progress, carrying value	0
Restructuring Reserve [Roll Forward]
Accruals	(9,099,000)	12,950,000	22,046,000
Post-acquisition charges [Member]
Restructuring Reserve [Roll Forward]
Ending balance		14,800,000
Severance [Member]
Restructuring Reserve [Roll Forward]
Accruals	(1,501,000)	14,753,000	0
Restructuring activities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring activities	10,437,000	11,006,000	0
Accounts Payable And Accured Liabilities [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	34,996,000
Accruals	13,335,000
Payments	(22,434,000)
Ending balance	25,897,000
Accounts Payable And Accured Liabilities [Member] | Post-acquisition charges [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	14,726,000
Accruals	0
Payments	(3,418,000)
Ending balance	11,308,000
Accounts Payable And Accured Liabilities [Member] | Severance [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	9,877,000
Accruals	(1,501,000)
Payments	(8,371,000)
Ending balance	5,000
Accounts Payable And Accured Liabilities [Member] | Restructuring activities [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	10,393,000
Accruals	14,836,000
Payments	(10,645,000)
Ending balance	$ 14,584,000