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REVENUE RECOGNITION - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Capitalized Contract Cost [Line Items]          
Deferred contract acquisition costs $ 6.9   $ 6.9   $ 8.0
Amortization of deferred contract costs 2.7 $ 2.6 5.6 $ 5.2  
Variable consideration from unredeemed vouchers sold in prior periods $ 4.3 $ 10.2 $ 3.0 $ 13.0  
Minimum          
Capitalized Contract Cost [Line Items]          
Deferred contract acquisition cost recognition period 12 months   12 months    
Maximum          
Capitalized Contract Cost [Line Items]          
Deferred contract acquisition cost recognition period 18 months   18 months