Quarterly report pursuant to Section 13 or 15(d)

Property, Plant, and Equipment, net - Deprecation Expense (Details)

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Property, Plant, and Equipment, net - Deprecation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Property, Plant and Equipment [Line Items]        
Total depreciation expense $ 2,227 $ 1,834 $ 6,433 $ 5,170
Cost of sales        
Property, Plant and Equipment [Line Items]        
Total depreciation expense 648 567 1,985 2,197
Sales and marketing expenses        
Property, Plant and Equipment [Line Items]        
Total depreciation expense 219 163 622 377
Product development        
Property, Plant and Equipment [Line Items]        
Total depreciation expense 353 295 1,021 580
General and administrative        
Property, Plant and Equipment [Line Items]        
Total depreciation expense $ 1,007 $ 809 $ 2,805 $ 2,016