REVENUE - Schedule of Revenue Streams (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 330,147	$ 325,472
Subscription license
Disaggregation of Revenue [Line Items]
Revenue	63,338	84,527
Perpetual license
Disaggregation of Revenue [Line Items]
Revenue	859	403
Maintenance
Disaggregation of Revenue [Line Items]
Revenue	81,001	79,630
Pega Cloud
Disaggregation of Revenue [Line Items]
Revenue	130,902	107,879
Consulting
Disaggregation of Revenue [Line Items]
Revenue	54,047	53,033
Subscription services
Disaggregation of Revenue [Line Items]
Revenue	211,903	187,509
Subscription
Disaggregation of Revenue [Line Items]
Revenue	275,241	272,036
Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Revenue	64,197	84,930
Revenue recognized at a point in time | Subscription license
Disaggregation of Revenue [Line Items]
Revenue	63,338	84,527
Revenue recognized at a point in time | Perpetual license
Disaggregation of Revenue [Line Items]
Revenue	859	403
Revenue recognized over time
Disaggregation of Revenue [Line Items]
Revenue	265,950	240,542
Revenue recognized over time | Maintenance
Disaggregation of Revenue [Line Items]
Revenue	81,001	79,630
Revenue recognized over time | Pega Cloud
Disaggregation of Revenue [Line Items]
Revenue	130,902	107,879
Revenue recognized over time | Consulting
Disaggregation of Revenue [Line Items]
Revenue	$ 54,047	$ 53,033