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Trade Accounts Payable and Accrued Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Payables and Accruals [Abstract]    
Trade accounts payable $ 8,758 $ 16,973
Federal excise taxes payable 10,509 14,275
Accrued other 13,155 17,245
Trade accounts payable and accrued expenses $ 32,422 $ 48,493