v3.25.2
Cover - shares
 6 Months Ended
Jun. 30, 2025
Jul. 30, 2025
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 001-39548  
Entity Registrant Name BENTLEY SYSTEMS, INCORPORATED  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 95-3936623  
Entity Address, Address Line One 685 Stockton Drive  
Entity Address, City or Town Exton  
Entity Address, State or Province PA  
Entity Address, Postal Zip Code 19341  
City Area Code 610  
Local Phone Number 458-5000  
Title of 12(b) Security Class B Common Stock, $0.01 Par Value  
Trading Symbol BSY  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Current Fiscal Year End Date --12-31  
Central Index Key 0001031308  
Amendment Flag false  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2025  
Class A Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   11,537,627
Class B Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   292,093,306