SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled contracts receivable	$ 217.3	$ 140.0
Sales allowance, billing-related adjustments	$ 1.0	$ 0.8
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Threshold period, past due for payment of services provided	30 days
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Threshold period, past due for payment of services provided	60 days