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Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Details) - USD ($)
$ in Thousands
6 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Cash paid for amounts included in the measurement of lease liabilities:    
Operating cash flows from operating leases $ 3,995 $ 8,670
Right-of-use assets obtained in exchange for lease obligations:    
Operating leases $ 1,316 $ 70,714