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BUSINESS COMBINATIONS - Netsil Acquisition (Details) - Netsil Inc. - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Mar. 22, 2018
Jul. 31, 2018
Business Acquisition [Line Items]    
Consideration transferred $ 67,500  
Cash payment to acquire business $ 3,700  
Business acquisition equity issued (in shares) 1,206,364  
Equity interests issued and issuable (in shares) $ 63,800  
Share price (in dollars per share) $ 52.87  
Deferred payment arrangement, number of shares (in shares) 104,426  
Holdback arrangement, amount $ 5,500  
Holdback arrangement, service period 2 years  
Goodwill acquired   $ 53,085
Intangible assets $ 19,000  
Estimated Life (in years) 7 years  
Deferred tax liabilities noncurrent $ (2,600)  
Liabilities assumed $ (1,400)  
Acquisition related costs   $ 400