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Trade Accounts Receivable - Schedule of Trade Accounts Receivable (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Dec. 31, 2015
Receivables [Abstract]      
Trade accounts receivable $ 108,806 $ 94,380  
Less: Allowance for doubtful accounts (2,493) (2,083) $ (189)
Trade accounts receivable, Net $ 106,313 $ 92,297