REVENUE - Revenue Stream (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 298,268	$ 274,337	$ 623,740	$ 650,644
Perpetual license
Disaggregation of Revenue [Line Items]
Revenue	1,579	2,266	1,982	9,706
Subscription license
Disaggregation of Revenue [Line Items]
Revenue	41,197	41,600	125,724	179,133
Consulting
Disaggregation of Revenue [Line Items]
Revenue	58,387	58,639	111,420	119,940
Subscription services
Disaggregation of Revenue [Line Items]
Revenue	197,105	171,832	384,614	341,865
Subscription
Disaggregation of Revenue [Line Items]
Revenue	238,302	213,432	510,338	520,998
Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Revenue	42,776	43,866	127,706	188,839
Revenue recognized at a point in time | Perpetual license
Disaggregation of Revenue [Line Items]
Revenue	1,579	2,266	1,982	9,706
Revenue recognized at a point in time | Subscription license
Disaggregation of Revenue [Line Items]
Revenue	41,197	41,600	125,724	179,133
Revenue recognized over time
Disaggregation of Revenue [Line Items]
Revenue	255,492	230,471	496,034	461,805
Revenue recognized over time | Maintenance
Disaggregation of Revenue [Line Items]
Revenue	82,042	78,326	161,672	158,042
Revenue recognized over time | Pega Cloud
Disaggregation of Revenue [Line Items]
Revenue	115,063	93,506	222,942	183,823
Revenue recognized over time | Consulting
Disaggregation of Revenue [Line Items]
Revenue	$ 58,387	$ 58,639	$ 111,420	$ 119,940