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Debt - Table (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Debt [Abstract]    
Credit facilities $ 24,034 $ 48,514
Industrial development bonds 10,000 15,000
Municipality-Related Loans 2,549 3,290
Other debt obligations (including capital leases) 21 0
Debt And Capital Lease Obligations 36,604 66,804
Short-term Debt (including capital leases) 0 0
Current portion of long-term debt (670) (5,736)
Long-term Debt and Capital Lease Obligations $ 35,934 $ 61,068