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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Accounts Receivable) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Allowance for Doubtful Accounts Receivable [Roll Forward]        
Beginning balance $ 8,158 $ 3,700 $ 7,679 $ 3,497
Additions 1,057 1,158 3,787 2,681
Deductions (175) (400) (2,426) (1,720)
Ending balance $ 9,040 $ 4,458 $ 9,040 $ 4,458
Accounts receivable, general payment terms     30 days  
Accounts receivable, international extended payment terms (greater than)     90 days