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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Accounts Receivable (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Allowance for Doubtful Accounts Receivable [Roll Forward]        
Beginning balance $ 4,041 $ 2,362 $ 3,838 $ 2,171
Additions 1,129 2,769 2,652 4,966
Deductions (400) (1,086) (1,720) (3,092)
Ending balance $ 4,770 $ 4,045 $ 4,770 $ 4,045
Accounts receivable, general payment terms     30 days  
Accounts receivable, international extended payment terms greater than     90 days