Employee Benefit Plans - Summary of Restricted Stock Award Activities Under Twenty Zero Five Directors Plan (Detail) - Restricted Stock shares in Thousands	12 Months Ended
	Oct. 31, 2017 $ / shares shares
Restricted shares
Beginning balance (in shares) | shares	43
Granted (in shares) | shares	20
Vested (in shares) | shares	(22)
Forfeited (in shares) | shares	(3)
Ending balance (in shares) | shares	38
Weighted Average Grant Date Fair Value
Weighted Average Grant Date Fair Value, Beginning balance (in USD per share) | $ / shares	$ 45.97
Granted (in USD per share) | $ / shares	71.34
Vested (in USD per share) | $ / shares	44.33
Forfeited (in USD per share) | $ / shares	47.65
Weighted Average Grant Date Fair Value, Ending balance (in USD per share) | $ / shares	$ 59.89