REVENUE - Schedule of Revenue Streams (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 351,153	$ 298,268	$ 681,300	$ 623,740
Subscription license
Disaggregation of Revenue [Line Items]
Revenue	84,647	41,197	147,985	125,724
Perpetual license
Disaggregation of Revenue [Line Items]
Revenue	36	1,579	895	1,982
Maintenance
Disaggregation of Revenue [Line Items]
Revenue	80,344	82,042
Pega Cloud
Disaggregation of Revenue [Line Items]
Revenue	134,086	115,063
Consulting
Disaggregation of Revenue [Line Items]
Revenue	52,040	58,387	106,087	111,420
Subscription services
Disaggregation of Revenue [Line Items]
Revenue	214,430	197,105	426,333	384,614
Subscription
Disaggregation of Revenue [Line Items]
Revenue	299,077	238,302	574,318	510,338
Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Revenue	84,683	42,776	148,880	127,706
Revenue recognized at a point in time | Subscription license
Disaggregation of Revenue [Line Items]
Revenue	84,647	41,197	147,985	125,724
Revenue recognized at a point in time | Perpetual license
Disaggregation of Revenue [Line Items]
Revenue	36	1,579	895	1,982
Revenue recognized at a point in time | Consulting
Disaggregation of Revenue [Line Items]
Revenue			106,087	111,420
Revenue recognized over time
Disaggregation of Revenue [Line Items]
Revenue	266,470	255,492	532,420	496,034
Revenue recognized over time | Perpetual license
Disaggregation of Revenue [Line Items]
Revenue			895	1,982
Revenue recognized over time | Maintenance
Disaggregation of Revenue [Line Items]
Revenue	80,344	82,042	161,345	161,672
Revenue recognized over time | Pega Cloud
Disaggregation of Revenue [Line Items]
Revenue	134,086	115,063	264,988	222,942
Revenue recognized over time | Consulting
Disaggregation of Revenue [Line Items]
Revenue	$ 52,040	$ 58,387	$ 106,087	$ 111,420