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DEFERRED COMMISSIONS (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Capitalized Contract Cost      
Deferred commissions $ 32.3 $ 29.8  
Deferred commissions amortization $ 11.9 $ 11.5 $ 9.6
Minimum      
Capitalized Contract Cost      
Sales commissions amortization period (in years) 3 years    
Maximum      
Capitalized Contract Cost      
Sales commissions amortization period (in years) 7 years