Revenue from Contracts with Customers - Disaggregated By Geographic Location (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Total revenue	$ 249,503	$ 210,500
North America
Disaggregation of Revenue [Line Items]
Total revenue	97,733	80,231
Asia/Pacific/Other
Disaggregation of Revenue [Line Items]
Total revenue	111,774	103,539
Rest of Europe
Disaggregation of Revenue [Line Items]
Total revenue	$ 39,996	$ 26,730