Segment and Geographic Information - Schedule of Reconciliation of Operating Income to Adjusted OI w/SBC (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	$ 362,621	$ 302,150	$ 230,542
Amortization of purchased intangibles	45,658	46,679	51,219
Deferred compensation plan	14,409	12,382	13,580
Realignment costs		847	12,579
Reportable Segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	362,621	302,150	230,542
Amortization of purchased intangibles	45,658	46,679	51,219
Deferred compensation plan	14,409	12,382	13,580
Acquisition expenses	7,229	10,222	17,866
Realignment expenses	0	789	11,470
AOI less SBC	$ 429,917	372,222	324,677
Reportable Segment \| Colleagues
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Realignment costs		$ 847	$ 12,579

BENTLEY SYSTEMS INC 10-K