Prepaid expenses (Detail) - USD ($) $ in Thousands	Oct. 31, 2019	Oct. 31, 2018
Prepaid Expense, Current [Abstract]
Parts and supplies	$ 33,617	$ 28,287
Prepaid insurance	8,859	8,232
Other prepaid expenses	14,455	6,721
Total prepaid expenses	$ 56,931	$ 43,240