Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment, net - Deprecation Expense (Details)

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Property and Equipment, net - Deprecation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Property, Plant and Equipment [Line Items]        
Total depreciation expense $ 14,011 $ 15,035 $ 41,888 $ 44,149
Cost of sales        
Property, Plant and Equipment [Line Items]        
Total depreciation expense 9,092 10,019 26,688 29,576
Sales and marketing expenses        
Property, Plant and Equipment [Line Items]        
Total depreciation expense 784 917 2,698 2,764
Product development        
Property, Plant and Equipment [Line Items]        
Total depreciation expense 796 872 2,403 2,396
General and administrative        
Property, Plant and Equipment [Line Items]        
Total depreciation expense $ 3,339 $ 3,227 $ 10,099 $ 9,413