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DEBT (Other Textual) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Long-term Debt, Fiscal Year Maturity [Abstract]      
2018 $ 2,132    
2019 111    
2020 108    
2021 110    
2022 107    
Thereafter 710,607    
Total interest paid 23,820 $ 15,332 $ 5,631
Amounts due banks, interest at 31.8% (29.0% in 2016) $ 2,020 $ 1,758  
Weighted average interest rates of borrowings under the Credit Agreement and borrowings of foreign subsidiaries (as a percent) 31.80% 29.00%