v3.26.3
REVENUE - Schedule of Remaining Performance Obligations (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Sep. 30, 2025
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 2,009,364 $ 1,754,526
Revenue remaining performance obligation, percentage 100.00% 100.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation   $ 899,527
Revenue remaining performance obligation, percentage   51.00%
Expected timing of satisfaction   1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 985,469 $ 398,552
Revenue remaining performance obligation, percentage 49.00% 23.00%
Expected timing of satisfaction 1 year 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 504,618 $ 213,653
Revenue remaining performance obligation, percentage 25.00% 12.00%
Expected timing of satisfaction 1 year 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 287,848 $ 242,794
Revenue remaining performance obligation, percentage 14.00% 14.00%
Expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 231,429  
Revenue remaining performance obligation, percentage 12.00%  
Expected timing of satisfaction  
Pega Cloud    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 1,596,836 $ 1,288,709
Pega Cloud | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation   $ 609,511
Expected timing of satisfaction   1 year
Pega Cloud | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 730,041 $ 319,940
Expected timing of satisfaction 1 year 1 year
Pega Cloud | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 416,308 $ 164,125
Expected timing of satisfaction 1 year 1 year
Pega Cloud | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 233,510 $ 195,133
Expected timing of satisfaction 1 year
Pega Cloud | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 216,977  
Expected timing of satisfaction  
Maintenance    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 325,237 $ 360,434
Maintenance | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation   $ 199,651
Expected timing of satisfaction   1 year
Maintenance | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 180,906 $ 71,730
Expected timing of satisfaction 1 year 1 year
Maintenance | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 85,371 $ 48,668
Expected timing of satisfaction 1 year 1 year
Maintenance | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 46,416 $ 40,385
Expected timing of satisfaction 1 year
Maintenance | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 12,544  
Expected timing of satisfaction  
Subscription license    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 42,086 $ 58,756
Subscription license | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation   $ 46,386
Expected timing of satisfaction   1 year
Subscription license | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 32,317 $ 4,404
Expected timing of satisfaction 1 year 1 year
Subscription license | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 1,476 $ 746
Expected timing of satisfaction 1 year 1 year
Subscription license | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 7,348 $ 7,220
Expected timing of satisfaction 1 year
Subscription license | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 945  
Expected timing of satisfaction  
Consulting    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 45,205 $ 46,627
Consulting | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation   $ 43,979
Expected timing of satisfaction   1 year
Consulting | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 42,205 $ 2,478
Expected timing of satisfaction 1 year 1 year
Consulting | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 1,463 $ 114
Expected timing of satisfaction 1 year 1 year
Consulting | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 574 $ 56
Expected timing of satisfaction 1 year
Consulting | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-10-01    
Disaggregation of Revenue [Line Items]    
Revenue remaining performance obligation $ 963  
Expected timing of satisfaction