REVENUE - Schedule of Revenue Streams (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Revenue	$ 475,633	$ 330,147
Pega Cloud
Disaggregation of Revenue [Line Items]
Revenue	151,123	130,902
Maintenance
Disaggregation of Revenue [Line Items]
Revenue	76,368	81,001
Subscription services
Disaggregation of Revenue [Line Items]
Revenue	227,491	211,903
Consulting
Disaggregation of Revenue [Line Items]
Revenue	60,421	54,047
Subscription license
Disaggregation of Revenue [Line Items]
Revenue	186,555	63,338
Subscription
Disaggregation of Revenue [Line Items]
Revenue	414,046	275,241
Perpetual license
Disaggregation of Revenue [Line Items]
Revenue	1,166	859
Revenue recognized over time
Disaggregation of Revenue [Line Items]
Revenue	287,912	265,950
Revenue recognized over time | Pega Cloud
Disaggregation of Revenue [Line Items]
Revenue	151,123	130,902
Revenue recognized over time | Maintenance
Disaggregation of Revenue [Line Items]
Revenue	76,368	81,001
Revenue recognized over time | Consulting
Disaggregation of Revenue [Line Items]
Revenue	60,421	54,047
Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Revenue	187,721	64,197
Revenue recognized at a point in time | Subscription license
Disaggregation of Revenue [Line Items]
Revenue	186,555	63,338
Revenue recognized at a point in time | Perpetual license
Disaggregation of Revenue [Line Items]
Revenue	$ 1,166	$ 859