STOCK COMPENSATION PLANS - Compensation Costs (Details) - USD ($)	3 Months Ended			6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Jan. 31, 2016	Apr. 30, 2017	Apr. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost	$ 3,693,000	$ 6,406,000		$ 9,379,000	$ 9,128,000
Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost	$ 1,902,000	4,742,000		$ 5,827,000	5,509,000
Performance Based Awards | Performance Share Plan 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share issued (in shares)	146,169			146,169
Total compensation cost	$ 0	799,000		$ 0	1,566,000
Performance Based Awards | Performance Share Plan 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share issued (in shares)	102,193			102,193
Total compensation cost	$ 709,000	3,943,000	$ 0	$ 1,343,000	3,943,000
Performance Based Awards | Performance Share Plan 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share issued (in shares)	129,025			129,025
Total compensation cost	$ 1,193,000	0		$ 4,484,000	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