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Accrued Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Accrued Liabilities [Abstract]    
Deferred revenue - affiliate $ 19,496 $ 19,132
Excise and other taxes 6,899 6,329
Payroll and related costs 3,108 2,703
Interest 2,814 8,439
Property taxes 2,608 2,454
Other 560 542
Accrued liabilities $ 35,485 $ 39,599