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Trade Accounts Payable and Accrued Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Payables and Accruals [Abstract]    
Trade accounts payable $ 16,973 $ 13,073
Federal excise taxes payable 14,275 13,945
Accrued other 17,245 15,973
Trade accounts payable and accrued expenses $ 48,493 $ 42,991