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Related Party Transactions (Details) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2016
Mar. 31, 2016
Mar. 31, 2017
Dec. 31, 2016
Related Party Transaction [Line Items]        
Accounts receivable, net of allowances     $ 12,530 $ 18,109
Subsidiary of common parent | QVC        
Related Party Transaction [Line Items]        
Accounts receivable, net of allowances       $ 784
Subsidiary of common parent | QVC | Total revenue | Customer concentration risk        
Related Party Transaction [Line Items]        
Concentration risk, percentage   7.00%    
Parent | Liberty        
Related Party Transaction [Line Items]        
Earned interest on promissory note   $ 166    
Collection of note receivable - Parent $ 36,400      
Interest paid $ 2,400      
Parent | Liberty | LIBOR        
Related Party Transaction [Line Items]        
Loans receivable, basis spread on variable rate 1.00%