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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Accounts Receivable) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Allowance for Doubtful Accounts Receivable [Roll Forward]        
Beginning balance $ 9,193 $ 3,540 $ 7,947 $ 3,838
Additions 1,198 850 2,730 1,523
Deductions (1,965) (349) (2,251) (1,320)
Ending balance $ 8,426 $ 4,041 $ 8,426 $ 4,041
Accounts receivable, general payment terms     30 days  
Accounts receivable, international extended payment terms greater than     90 days