Segment and Geographic Information - Revenue By Product Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Total revenue	$ 1,933,347	$ 1,807,159	$ 1,458,415
Operating Segments
Total revenue	1,933,347	1,807,159	1,458,415
Digital Thread Core Group | Operating Segments
Total revenue	1,318,857	1,257,817	1,025,709
Digital Thread Growth Group | Operating Segments
Total revenue	279,566	273,949	215,353
Digital Thread FSG Group | Operating Segments
Total revenue	251,621	233,268	210,101
Digital Thread Group | Operating Segments
Total revenue	1,850,044	1,765,034	1,451,163
Velocity Group | Operating Segments
Total revenue	83,303	42,125	7,252
Product lifecycle management (PLM) | Operating Segments
Total revenue	1,137,016	1,012,120	807,016
Computer-aided design (CAD) | Operating Segments
Total revenue	$ 796,331	$ 795,039	$ 651,399