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STOCK-BASED AWARDS - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]        
Percent purchase price, grant date, ESPP     85.00%  
Percent purchase price, exercise date, ESPP     85.00%  
Number of shares issuable under plan (in shares) 4,326,341   4,326,341  
Incentive stock options        
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]        
Stock options granted (in shares) 0 0 0 0
Restricted Stock Units (RSUs)        
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]        
Unrecognized compensation expense related to non-vested restricted stock units $ 125.2   $ 125.2  
Unrecognized compensation expense, expected recognition weighted average period     2 years 6 months  
Performance Shares        
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]        
Unrecognized compensation expense, expected recognition weighted average period     1 year 7 months 6 days  
Unrecognized compensation expense $ 14.9   $ 14.9