Financial Instruments - Fair Value of Derivatives (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Oct. 31, 2018
Fair value of derivatives
Asset derivatives	$ 10,898	$ 10,901
Liability derivatives	9	13
Forward currency contracts
Fair value of derivatives
Asset derivatives	10,898	10,901
Liability derivatives	9	13
Forward currency contracts | Derivatives Designated as Hedging Instruments | Prepaid expenses and other current assets
Fair value of derivatives
Asset derivatives	8,642	8,596
Forward currency contracts | Derivatives Not Designated as Hedging Instruments | Prepaid expenses and other current assets
Fair value of derivatives
Asset derivatives	2,256	2,305
Forward currency contracts | Derivatives Not Designated as Hedging Instruments | Accrued liabilities
Fair value of derivatives
Liability derivatives	$ 9	$ 13