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Consolidated Statements Of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2017
Statement of Comprehensive Income [Abstract]      
Deferred gain (loss), tax $ (2,009) $ 4,675 $ (4,380)
Reclassification adjustment on deferred (gains) loss included in net income, tax (3,672) 2,207 (168)
Changes in unrealized gains (losses) on available-for-sale securities, tax $ 0 $ 0 $ 0