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Schedule of Business Acquisition - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
Dec. 31, 2015
Mar. 31, 2016
Mar. 31, 2015
Acquisitions      
Maximum period for payment for adjustments to provisional fair value measurements   1 year  
Goodwill $ 123,950 $ 125,614 $ 122,923
North America      
Acquisitions      
Goodwill 85,834 $ 86,038 $ 84,216
North America | EBTY      
Acquisitions      
Payments to acquire business 3,400    
Goodwill 2,000    
Business combination, intangible assets acquired $ 1,100    
Business combination, intangible assets acquired, weighted average useful life 7 years