Fair Value of Financial Instruments and Non-Financial Assets - Measured on a Nonrecurring Basis (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended	12 Months Ended			3 Months Ended	12 Months Ended
	Aug. 31, 2010	Sep. 30, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011 Fair Value, Measurements, Nonrecurring [Member]	Dec. 31, 2011 Fair Value, Measurements, Nonrecurring [Member]	Dec. 31, 2010 Fair Value, Measurements, Nonrecurring [Member]	Dec. 31, 2011 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2010 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2011 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2010 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2011 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2010 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Goodwill										$ 0		$ 0		$ 0
Property and equipment										0		0		0
Wireless licenses									0	0	0	0	9,115	7,496
Total Assets									0	0	0	0	9,115	7,496
Asset Impairment Charges [Abstract]
Goodwill impairment	430,100		0	430,101	0			430,101
Property and equipment, impairment loss		46,500	0	46,460	0			46,460
Wireless license impairment			377	766	639	377	377	766
Asset Impairment Charges			$ 22,423	$ 477,327	$ 639	$ 377	$ 377	$ 477,327