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DEBT (Revolving Credit Agreement) (Details) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Sep. 30, 2014
Dec. 31, 2016
Dec. 31, 2015
Debt Instrument [Line Items]      
Amounts due banks   $ 1,758 $ 2,822
Revolving credit agreement      
Debt Instrument [Line Items]      
Borrowing capacity under the line of credit   $ 400,000  
Credit agreement initiation date Sep. 12, 2014    
Credit facility covenant compliance   As of December 31, 2016, the Company was in compliance with all of its covenants  
Debt Instrument, Term   5 years  
Additional increase in borrowing capacity of the line of credit available at the entity's option   $ 100,000