Income Taxes - Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Current expense (benefit):
Federal	$ (735)	$ (600)	$ 117,611
State	(51)	(1,169)	11,024
Current income tax expense	(786)	(1,769)	128,635
Deferred expense (benefit):
Federal	13,966	(28,845)	15,452
State	2,753	2,146	1,804
Change in valuation allowance	(5,380)	(2,406)	(1,106)
Deferred income tax expense	11,339	(29,105)	16,150
Income tax expense (benefit)	$ 10,553	$ (30,874)	$ 144,785