Annual report pursuant to Section 13 and 15(d)

Property and Equipment, net - Deprecation Expense (Details)

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Property and Equipment, net - Deprecation Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment [Line Items]    
Total depreciation expense $ 56,672 $ 61,905
Cost of sales    
Property, Plant and Equipment [Line Items]    
Total depreciation expense 36,971 42,535
Sales and marketing    
Property, Plant and Equipment [Line Items]    
Total depreciation expense 3,450 3,553
Product development    
Property, Plant and Equipment [Line Items]    
Total depreciation expense 3,181 3,257
General and administrative    
Property, Plant and Equipment [Line Items]    
Total depreciation expense $ 13,070 $ 12,560