Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash Flow, Operating Activities, Lessee [Abstract]
Operating cash flows from operating leases	$ 2,463	$ 1,807
Operating cash flows from finance leases	15	29
Financing cash flows from finance leases	$ 304	$ 290