REVENUE - Performance Obligations (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	$ 1,125,694	$ 1,031,136
Revenue remaining performance obligation, percentage	100.00%	100.00%
1 year or less
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	$ 610,726	$ 567,154
Revenue remaining performance obligation, percentage	54.00%	56.00%
1-2 years
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	$ 281,132	$ 272,622
Revenue remaining performance obligation, percentage	25.00%	26.00%
2-3 years
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	$ 132,216	$ 126,602
Revenue remaining performance obligation, percentage	12.00%	12.00%
Greater than 3 years
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	$ 101,620	$ 64,758
Revenue remaining performance obligation, percentage	9.00%	6.00%
Maintenance
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	$ 309,686	$ 336,449
Maintenance | 1 year or less
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	204,974	214,645
Maintenance | 1-2 years
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	57,862	59,164
Maintenance | 2-3 years
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	28,403	36,076
Maintenance | Greater than 3 years
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	18,447	26,564
Pega Cloud
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	698,167	602,735
Pega Cloud | 1 year or less
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	320,102	281,793
Pega Cloud | 1-2 years
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	200,135	194,841
Pega Cloud | 2-3 years
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	96,861	88,855
Pega Cloud | Greater than 3 years
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	81,069	37,246
Subscription license
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	61,327	63,018
Subscription license | 1 year or less
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	46,810	46,146
Subscription license | 1-2 years
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	10,711	15,708
Subscription license | 2-3 years
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	2,126	909
Subscription license | Greater than 3 years
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	1,680	255
Perpetual license
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	13,438	6,941
Perpetual license | 1 year or less
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	6,681	6,707
Perpetual license | 1-2 years
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	4,505	234
Perpetual license | 2-3 years
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	2,252	0
Perpetual license | Greater than 3 years
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	0	0
Consulting
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	43,076	21,993
Consulting | 1 year or less
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	32,159	17,863
Consulting | 1-2 years
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	7,919	2,675
Consulting | 2-3 years
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	2,574	762
Consulting | Greater than 3 years
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	$ 424	$ 693
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01
Disaggregation of Revenue [Line Items]
Expected timing of satisfaction		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Disaggregation of Revenue [Line Items]
Expected timing of satisfaction		2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Disaggregation of Revenue [Line Items]
Expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Disaggregation of Revenue [Line Items]
Expected timing of satisfaction	2 years	3 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Disaggregation of Revenue [Line Items]
Expected timing of satisfaction	3 years	3 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Disaggregation of Revenue [Line Items]
Expected timing of satisfaction	3 years