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Leases - Costs and Other Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Apr. 30, 2020
Apr. 30, 2020
Lease costs    
Amortization of financing lease assets $ 251 $ 469
Operating lease cost 2,063 4,125
Short-term lease cost 1,022 1,649
Interest on financing lease liabilities 57 113
Total lease cost 3,393 6,356
Operating cash flows for operating leases 2,019 3,931
Financing cash flows for finance leases 212 410
Operating cash flows for finance leases $ 57 $ 94