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Other Operating Expenses, Net Other Operating Expenses (Income) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Other Income and Expenses [Abstract]      
Environmental Remediation Expense $ 0 $ 931 $ 340
Impairment of long-lived assets 0 0 3,046
Ending balance $ 0 $ 931 $ 3,386
Term of Lease 10 years