Income Taxes (Narrative) (Details) - USD ($)	3 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Oct. 31, 2019
Income Taxes [Abstract]
Income taxes	$ 32,578,000	$ 27,625,000
Effective income tax rate (as a percent)	22.80%	23.40%
Income tax provision related to net income attributable to non-controlling and other beneficial interests not taxable to the Company	$ 900,000	$ 1,400,000
Income tax provision principally related to limitations on the deductibility of executive compensation related to 2017 Tax Act	1,300,000	600,000
Net excess tax benefit attributable to the exercise of employee stock options and vesting of restricted stock awards	4,900,000	$ 2,900,000
Deferred tax assets, valuation allowance	0		$ 0
United Kingdom [Member]
Income Taxes [Line Items]
Undistributed earnings of certain foreign subsidiaries	$ 4,800,000