FAIR VALUE MEASUREMENTS (Fair Value Hierarchy, by Category) (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Oct. 31, 2020
Deferred Compensation Plans [Abstract]
Deferred compensation plans	$ 238,936	$ 180,139
Liabilities:
Contingent consideration	43,931	41,974
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Deferred Compensation Plans [Abstract]
Deferred compensation plans	392	11
Significant Other Observable Inputs (Level 2) [Member]
Deferred Compensation Plans [Abstract]
Deferred compensation plans	238,544	180,128
Significant Unobservable Inputs (Level 3) [Member]
Liabilities:
Contingent consideration	43,931	41,974
Corporate Owned Life Insurance [Member]
Deferred Compensation Plans [Abstract]
Deferred compensation plans	238,544	180,128
Corporate Owned Life Insurance [Member] | Significant Other Observable Inputs (Level 2) [Member]
Deferred Compensation Plans [Abstract]
Deferred compensation plans	238,544	180,128
Money Market Funds [Member]
Deferred Compensation Plans [Abstract]
Deferred compensation plans	392	11
Money Market Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Deferred Compensation Plans [Abstract]
Deferred compensation plans	$ 392	$ 11