Leases - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Lessee Lease Description [Line Items]
Operating lease, existence of option to extend			true
Operating lease, option to extend			Some of our leases include options to extend or terminate the lease prior to the end of the agreed upon lease term. For purposes of calculating lease liabilities, lease terms include options to extend or terminate the lease when it is reasonably certain that we will exercise such options.
Operating lease, existence of option to terminate			true
Operating lease, option to terminate			Some of our leases include options to extend or terminate the lease prior to the end of the agreed upon lease term. For purposes of calculating lease liabilities, lease terms include options to extend or terminate the lease when it is reasonably certain that we will exercise such options.
Cash payments related to operating leases	$ 1,800	$ 2,100	$ 5,900	$ 5,700
Cash payments related to financing leases	$ 100		$ 326	$ 96
Minimum
Lessee Lease Description [Line Items]
Operating lease remaining term	1 year		1 year
Maximum
Lessee Lease Description [Line Items]
Operating lease remaining term	7 years		7 years