Income Taxes - Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Current expense (benefit):
Federal	$ (114,734)	$ (735)	$ (600)
State	2,609	(51)	(1,169)
Current income tax expense	(112,125)	(786)	(1,769)
Deferred expense (benefit):
Federal	71,214	13,966	(28,845)
State	(489)	2,753	2,146
Change in valuation allowance	(3,185)	(5,380)	(2,406)
Deferred income tax expense	67,540	11,339	(29,105)
Income tax expense (benefit)	$ (44,585)	$ 10,553	$ (30,874)