FAIR VALUE MEASUREMENTS (Fair Value Hierarchy, by Category) (Details) - USD ($) $ in Thousands	Apr. 30, 2020	Oct. 31, 2019
Deferred Compensation Plans [Abstract]
Deferred compensation plans	$ 157,522	$ 151,891
Liabilities:
Contingent consideration	18,993	18,326
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Deferred Compensation Plans [Abstract]
Deferred compensation plans	0	20
Liabilities:
Contingent consideration	0	0
Significant Other Observable Inputs (Level 2) [Member]
Deferred Compensation Plans [Abstract]
Deferred compensation plans	157,522	151,871
Liabilities:
Contingent consideration	0	0
Significant Unobservable Inputs (Level 3) [Member]
Deferred Compensation Plans [Abstract]
Deferred compensation plans	0	0
Liabilities:
Contingent consideration	18,993	18,326
Corporate Owned Life Insurance [Member]
Deferred Compensation Plans [Abstract]
Deferred compensation plans	157,522	151,871
Corporate Owned Life Insurance [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Deferred Compensation Plans [Abstract]
Deferred compensation plans	0	0
Corporate Owned Life Insurance [Member] | Significant Other Observable Inputs (Level 2) [Member]
Deferred Compensation Plans [Abstract]
Deferred compensation plans	157,522	151,871
Corporate Owned Life Insurance [Member] | Significant Unobservable Inputs (Level 3) [Member]
Deferred Compensation Plans [Abstract]
Deferred compensation plans	$ 0	0
Money Market Funds [Member]
Deferred Compensation Plans [Abstract]
Deferred compensation plans		20
Money Market Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Deferred Compensation Plans [Abstract]
Deferred compensation plans		20
Money Market Funds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Deferred Compensation Plans [Abstract]
Deferred compensation plans		0
Money Market Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Deferred Compensation Plans [Abstract]
Deferred compensation plans		$ 0