Credit Facility - Interest Rate Swaps (Details) - USD ($)	6 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Nov. 01, 2018	Oct. 31, 2017
Line of Credit Facility [Line Items]
Proceeds from termination of interest rate swaps	$ 25,900,000	$ 0
Net gains from cash flow hedges recorded in accumulated other comprehensive loss, net of tax	18,600,000			$ 1,700,000
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months, gross	3,800,000
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months, net	1,500,000
Accumulated Net Gain (Loss) from Cash Flow Hedges
Line of Credit Facility [Line Items]
Tax related to amounts in accumulated other comprehensive loss	$ 7,400,000			$ 1,200,000
Subsequent Event | Interest Rate Swap, Maturity 4/30/2021
Line of Credit Facility [Line Items]
Notional amount			$ 90,000,000
Derivative, fixed interest rate (percent)			2.8275%
Subsequent Event | Interest Rate Swap, Maturity 10/31/2021
Line of Credit Facility [Line Items]
Notional amount			$ 90,000,000
Derivative, fixed interest rate (percent)			2.84%
Subsequent Event | Interest Rate Swap, Maturity 4/30/2022
Line of Credit Facility [Line Items]
Notional amount			$ 130,000,000
Derivative, fixed interest rate (percent)			2.86%
Subsequent Event | Interest Rate Swap, Maturity 9/1/2022
Line of Credit Facility [Line Items]
Notional amount			$ 130,000,000
Derivative, fixed interest rate (percent)			2.84%