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Accounts and Other Receivables - Net (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Receivables [Abstract]    
Accounts receivables $ 162,676 $ 188,477
Other 1,801 8,936
Total accounts and other receivables 164,477 197,413
Less – allowance for doubtful accounts (1,567) (1,410)
Total accounts and other receivables – net $ 162,910 $ 196,003