Condensed Consolidated Statements of Comprehensive Income (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 52,004	$ 48,567
Components of other comprehensive income:
Foreign currency translation adjustments	2,793	16,463
Amortization of prior service cost and net actuarial losses, net of tax	3,229	1,352
Total other comprehensive income	6,022	17,815
Total comprehensive income	$ 58,026	$ 66,382