REVENUE - Revenue Stream (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 325,472	$ 376,307
Perpetual license
Disaggregation of Revenue [Line Items]
Revenue	403	7,440
Subscription license
Disaggregation of Revenue [Line Items]
Revenue	84,527	137,533
Subscription services
Disaggregation of Revenue [Line Items]
Revenue	187,509	170,033
Subscription
Disaggregation of Revenue [Line Items]
Revenue	272,036	307,566
Consulting
Disaggregation of Revenue [Line Items]
Revenue	53,033	61,301
Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Revenue	84,930	144,973
Revenue recognized at a point in time | Perpetual license
Disaggregation of Revenue [Line Items]
Revenue	403	7,440
Revenue recognized at a point in time | Subscription license
Disaggregation of Revenue [Line Items]
Revenue	84,527	137,533
Revenue recognized over time
Disaggregation of Revenue [Line Items]
Revenue	240,542	231,334
Revenue recognized over time | Maintenance
Disaggregation of Revenue [Line Items]
Revenue	79,630	79,716
Revenue recognized over time | Pega Cloud
Disaggregation of Revenue [Line Items]
Revenue	107,879	90,317
Revenue recognized over time | Consulting
Disaggregation of Revenue [Line Items]
Revenue	$ 53,033	$ 61,301