REVENUE - Schedule of Revenue Streams (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,432,616	$ 1,317,845	$ 1,211,653
Subscription license
Disaggregation of Revenue [Line Items]
Total revenue	407,625	366,063	336,248
Perpetual license
Disaggregation of Revenue [Line Items]
Total revenue	10,101	19,293	32,172
Maintenance
Disaggregation of Revenue [Line Items]
Total revenue	331,856	317,564	320,257
Pega Cloud
Disaggregation of Revenue [Line Items]
Total revenue	461,328	384,271	300,966
Subscription services
Disaggregation of Revenue [Line Items]
Total revenue	793,184	701,835	621,223
Subscription
Disaggregation of Revenue [Line Items]
Total revenue	1,200,809	1,067,898	957,471
Consulting
Disaggregation of Revenue [Line Items]
Total revenue	221,706	230,654	222,010
Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	417,726	385,356	368,420
Revenue recognized at a point in time | Subscription license
Disaggregation of Revenue [Line Items]
Total revenue	407,625	366,063	336,248
Revenue recognized at a point in time | Perpetual license
Disaggregation of Revenue [Line Items]
Total revenue	10,101	19,293	32,172
Revenue recognized over time
Disaggregation of Revenue [Line Items]
Total revenue	1,014,890	932,489	843,233
Revenue recognized over time | Maintenance
Disaggregation of Revenue [Line Items]
Total revenue	331,856	317,564	320,257
Revenue recognized over time | Pega Cloud
Disaggregation of Revenue [Line Items]
Total revenue	461,328	384,271	300,966
Revenue recognized over time | Consulting
Disaggregation of Revenue [Line Items]
Total revenue	$ 221,706	$ 230,654	$ 222,010