Recent Accounting Standards New Accounting Standards (Details) - USD ($) $ in Thousands	9 Months Ended
	Jul. 31, 2018	Apr. 30, 2020	Oct. 31, 2019	Nov. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, right-of-use asset		$ 50,984	$ 0
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, right-of-use asset				$ 50,540
Operating lease, liability				$ 2,000
Adjustments for New Accounting Principle, Early Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 322