Leases - Components Of Lease Expense (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
		Apr. 30, 2020	Apr. 30, 2020
Leases [Abstract]
Operating lease expense		$ 23,281	$ 46,482
Variable lease expense	[1]	1,050	1,992
Total lease expense		$ 24,331	$ 48,474

[1] Variable lease expense includes payments to lessors that are not fixed or determinable at lease commencement date. These payments primarily consist of maintenance, property taxes, insurance and variable indexed based payments.