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Credit Facilities and Long-Term Debt, Total Debt Outstanding (Details)
PLN in Thousands, $ in Thousands
Dec. 31, 2017
USD ($)
Dec. 31, 2017
PLN
Dec. 31, 2016
USD ($)
Credit Facilities and Long-Term Debt [Abstract]      
Revolving credit facilities $ 57,000   $ 54,812
Other [1] 4,778   163
Total debt 61,778   54,975
Current maturities of debt 61,699   54,855
Long-term debt 79   $ 120
Overdraft facility $ 4,700 PLN 16,200  
[1] Other includes borrowings under our Polish overdraft facility of Zloty 16.2 million (approximately $4.7 million).