STOCK COMPENSATION PLANS - Compensation Costs (Details) - USD ($)	3 Months Ended		6 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost	$ 4,400,000	$ 3,700,000	$ 10,600,000	$ 9,400,000
Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost	$ 2,347,000	1,902,000	$ 6,519,000	5,827,000
Performance Based Awards | Performance Share Plan 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share issued (in shares)	102,193		102,193
Total compensation cost	$ 0	709,000	$ 0	1,343,000
Performance Based Awards | Performance Share Plan 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share issued (in shares)	145,469		145,469
Total compensation cost	$ 828,000	1,193,000	$ 1,674,000	4,484,000
Performance Based Awards | Performance Share Plan 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share issued (in shares)	105,765		105,765
Total compensation cost	$ 1,519,000	0	$ 4,845,000	0
Performance Based Awards | Performance Share Plan 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share issued (in shares)	0		0
Total compensation cost	$ 0	$ 0	$ 0	$ 0