Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		12 Months Ended
	Apr. 30, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Income Taxes [Line Items]
CARES Act, income tax benefit, operating loss			$ 50,400,000
CARES Act, income tax expense			11,300,000
Discrete tax benefit	$ 37,500,000		$ 0	$ 0	$ 37,505,000
Federal statutory rate					23.30%
Effective income tax rate			273.30%	16.50%	(101.00%)
Effective income tax rate, excluding discrete items		23.60%	21.30%		33.00%
Recorded valuation allowance		$ 5,637,000	$ 2,452,000	$ 5,637,000
Release from valuation allowance			1,100,000	1,800,000	$ 700,000
State income tax credits		9,333,000	8,576,000	9,333,000
Unrecognized tax benefits		$ 0	2,400,000	$ 0
Income Tax penalties and interest			$ 1,100,000
North Carolina
Income Taxes [Line Items]
Investment tax credit provided by Investing in Business Property Credit			7.00%
State income tax credits			$ 1,300,000
Georgia
Income Taxes [Line Items]
State income tax credits			$ 2,300,000