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Credit Facilities and Long-Term Debt, Total Debt Outstanding (Details)
$ in Thousands, zł in Millions
Jun. 30, 2018
USD ($)
Jun. 30, 2018
PLN (zł)
Dec. 31, 2017
USD ($)
Credit Facilities and Long-Term Debt [Abstract]      
Revolving credit facilities $ 88,528   $ 57,000
Other [1] 5,203   4,778
Total debt 93,731   61,778
Current maturities of debt 93,697   61,699
Long-term debt 34   $ 79
HSBC Bank Polska S.A. [Member]      
Line of Credit Facility [Abstract]      
Overdraft facility $ 5,100 zł 19.1  
[1] Other includes borrowings under our Polish overdraft facility of Zloty 19.1 million (approximately $5.1 million).