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Other Information (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Disposal Group [Line Items]        
Gain on sale of assets, net $ 0 $ 0 $ 0 $ 13,437
Business.com
       
Disposal Group [Line Items]        
Gain on sale of assets, net       $ 13,437