STOCK COMPENSATION PLANS - Compensation Costs (Details) - USD ($)	3 Months Ended		6 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock based compensation expense	$ 3,000,000.0	$ 4,400,000	$ 5,900,000	$ 10,600,000
Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock based compensation expense	$ 650,000	2,347,000	$ 1,263,000	6,519,000
Performance Based Awards | Performance Share Plan 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share issued (in shares)	145,197		145,197
Total stock based compensation expense	$ 0	828,000	$ 0	1,674,000
Performance Based Awards | Performance Share Plan 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share issued (in shares)	85,159		85,159
Total stock based compensation expense	$ 650,000	1,519,000	$ 1,263,000	4,845,000
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 stock based compensation expense	$ 0	0	$ 0	0
Performance Based Awards | Performance Share Plan 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share issued (in shares)	0		0
Total stock based compensation expense	$ 0	$ 0	$ 0	$ 0