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Condensed Consolidated Statements of Comprehensive Income (UNAUDITED) - USD ($)
$ in Thousands
3 Months Ended
Jan. 31, 2019
Jan. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]    
Net income $ 48,567 $ 104,555
Components of other comprehensive income:    
Foreign currency translation adjustments 16,463 38,582
Amortization of prior service cost and net actuarial losses, net of tax 1,352 1,509
Total other comprehensive income 17,815 40,091
Total comprehensive income $ 66,382 $ 144,646