REVENUE Deferred Revenue Activity (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Movement in Deferred Revenue [Roll Forward]
Deferred revenue at beginning of period	$ 98,082	$ 99,258
Billings deferred	57,094	56,846
Recognition of prior deferred revenue	(78,501)	(69,337)
Deferred revenue at end of period	76,675	86,767
Deferred Revenue Arrangement [Line Items]
Remaining Performance Obligation	22,500
Deferred Revenue	76,675	$ 86,767
Subscription
Deferred Revenue Arrangement [Line Items]
Remaining Performance Obligation	7,922
Subscriptions
Deferred Revenue Arrangement [Line Items]
Remaining Performance Obligation	8,545
Maintenance contracts
Deferred Revenue Arrangement [Line Items]
Remaining Performance Obligation	55,435
Implied PCS
Deferred Revenue Arrangement [Line Items]
Remaining Performance Obligation	4,293
Professional services, training and other
Deferred Revenue Arrangement [Line Items]
Remaining Performance Obligation	$ 480