Impairments and Other Charges (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended	12 Months Ended
Aug. 31, 2010	Sep. 30, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Asset Impairment Charges [Abstract]
Goodwill impairment (Note 5)	$ 430,100		$ 0	$ 430,101	$ 0
Wireless license impairment (Note 5)			377	766	639
Property and equipment impairment (Note 2)		46,500	0	46,460	0
Post-acquisition charges (Note 6)			26,393	0	0
Impairments and other charges			$ 26,770	$ 477,327	$ 639

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

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+ Details

- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

+ References

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+ Details