Stock Based Compensation Plans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Stock-based compensation expense:
Stock options (under the Omnibus Incentive Plans)	$ 4,818	$ 4,590	$ 10,520	$ 9,729
Restricted shares (under the Omnibus Incentive Plans)	11,549	11,013	23,623	21,951
Phantom stock units (under the Omnibus Incentive Plans)	105	97	226	124
Employee stock purchase plans	0	0	176	211
Employee stock purchase incentive plan	496	328	549	360
Atlanta Capital Plan	855	652	1,710	1,417
Parametric Plan	940	1,790	1,880	2,939
Parametric Phantom Incentive Plan	378	0	756	0
Total stock-based compensation expense	19,141	18,470	39,440	36,731
Tax benefits expected to be realized for tax deductions from option exercises	$ 7,000	$ 6,300	$ 14,300	$ 12,300