Income Taxes (Narrative) (Details) - USD ($)		12 Months Ended
	Dec. 22, 2017	Oct. 31, 2020	Oct. 31, 2019	Dec. 31, 2018	Oct. 31, 2018
Income Taxes [Abstract]
Income taxes		$ 83,900,000	$ 135,252,000		$ 156,703,000
Effective income tax rate (as a percent)		25.10%	24.20%		28.80%
Statutory U.S. federal income tax rate	35.00%	21.00%	21.00%	21.00%	23.30%
Total non-recurring charge to Income Taxes to reflect the estimated impact of the enactment of the Tax Cuts and Jobs Act			$ 3,200,000		$ 24,000,000.0
Non-recurring charge to income taxes to reflect the revaluation of the Company's deferred tax assets and liabilities to reflect the impact of the enactment of the Tax Cuts and Jobs Act			5,400,000		21,200,000
Non-recurring charge to income taxes to reflect the deemed repatriation of foreign-source net earnings to reflect the impact of the enactment of the Tax Cuts and Jobs Act					2,800,000
Income tax provision related to net income attributable to non-controlling and other beneficial interests not taxable to the Company		$ 1,300,000	8,400,000		4,400,000
Income tax provision principally related to limitations on the deductibility of executive compensation related to 2017 Tax Act		5,700,000
Net excess tax benefit attributable to the exercise of employee stock options and vesting of restricted stock awards		9,000,000.0			17,500,000
Deferred tax assets, equity method investments		18,200,000
Impairment loss on investment		16,600,000
Deferred tax assets, valuation allowance		18,166,000	0
Valuation allowance, other		0
Income Taxes [Line Items]
Interest and penalties recognized in the income tax provision due to the Company's tax position		$ 300,000	100,000		100,000
Income Tax Examination Description		The Company is generally no longer subject to income tax examinations by U.S. federal, state, local or non-U.S. taxing authorities for fiscal years prior to fiscal 2017.
Non-current tax benefits that would change the effective tax rate if recognized		$ 800,000	700,000		$ 700,000
Current unrecognized tax benefits		800,000
Accrued interest and penalties		1,100,000	800,000
Canadian Affliate [Member]
Income Taxes [Line Items]
Undistributed earnings of certain foreign subsidiaries			8,500,000
Dividends received			65,200,000
Tax expense reduction due to a realized foreign exchange loss			$ 500,000
United Kingdom [Member]
Income Taxes [Line Items]
Undistributed earnings of certain foreign subsidiaries		$ 11,600,000