v3.19.3
ACQUISITIONS - Narrative (Details) - USD ($)
$ in Thousands
9 Months Ended
May 31, 2018
Sep. 30, 2019
Sep. 30, 2018
Business Acquisition [Line Items]      
Payments to acquire businesses, net of cash acquired   $ 20,372 $ 112,399
Weebly, Inc.      
Business Acquisition [Line Items]      
Percent of outstanding shares acquired 100.00%    
Cash consideration $ 132,432    
Equity consideration (in shares) 2,418,271    
Equity consideration fair value $ 140,107    
Payment to settle outstanding vested and unvested employee options 17,700    
Post-combination compensation expense $ 2,600    
Goodwill adjustment to purchase price allocation   3,700  
Tax liabilities adjustment to purchase price allocation   4,700  
Cash withheld for indemnification   $ 19,400  
Shares withheld for indemnification (in shares)   363,266  
Series of Individually Immaterial Business Acquisitions      
Business Acquisition [Line Items]      
Payments to acquire businesses, net of cash acquired   $ 20,400