Stock Plans - Schedule of Stock Option Plans (Details)	12 Months Ended
	Oct. 31, 2019 USD ($) $ / shares shares
Number of Shares
Vested and expected to vest at end of period (in shares) | shares	982,685
Vested and exercisable at end of period (in shares) | shares	335,551
Weighted- Average Exercise Price Per Share
Vested and expected to vest at end of period (in dollars per share) | $ / shares	$ 184.31
Vested and exercisable at end of period (in dollars per share) | $ / shares	$ 145.32
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Vested and expected to vest at end of period, Weighted-Average Remaining Contractual Term (in years)	6 years 5 months 1 day
Vested and exercisable at end of period, Weighted-Average Remaining Contractual Term (in years)	4 years 11 months 23 days
Vested and expected to vest at end of period, Aggregate Intrinsic Value | $	$ 104,843,305
Vested and exercisable at end of period, Aggregate Intrinsic Value | $	$ 48,882,775
Stock Options
Number of Shares
Outstanding, beginning balance (in shares) | shares	1,086,998
Granted (in shares) | shares	198,232
Exercised (in shares) | shares	(235,988)
Forfeited or expired (in shares) | shares	(24,490)
Outstanding, ending balance (in shares) | shares	1,024,752
Weighted- Average Exercise Price Per Share
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 160.31
Granted (in dollars per share) | $ / shares	254.77
Exercised (in dollars per share) | $ / shares	126.23
Forfeited or expired (in dollars per share) | $ / shares	168.14
Outstanding, ending balance (in dollars per share) | $ / shares	$ 186.24
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, ending balance, Weighted Average Remaining Contractual Term (in years)	6 years 6 months 3 days