ORGANIZATION, BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Sale of Investment Property and Property Held for Sale (Details) - USD ($)	1 Months Ended		3 Months Ended								12 Months Ended
	Jul. 31, 2017	Mar. 31, 2017	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Property Held for Sale [Abstract]
Gain (loss) on sale of properties											$ 0	$ 18,734,000	$ 0
Revenues			$ 32,543,000	$ 32,809,000	$ 37,005,000	$ 32,995,000	$ 32,313,000	$ 32,020,000	$ 30,024,000	$ 29,202,000	135,352,000	123,560,000	116,792,000
Depreciation and amortization											(28,324,000)	(26,512,000)	(23,025,000)
Net Income											42,183,000	55,432,000	34,605,000
Held for Sale [Member] | White Plains, NY [Member]
Property Held for Sale [Abstract]
Proceeds from sale of property held for sale		$ 56,600,000
Gain (loss) on sale of properties		$ 19,500,000
Held for Sale [Member] | Fairfield, CT Property [Member]
Property Held for Sale [Abstract]
Proceeds from sale of property held for sale	$ 1,200,000
Gain (loss) on sale of properties	$ (729,000)
Disposal Group, Not Discontinued Operations [Member] | White Plains Property and Fairfield Property Member [Member]
Property Held for Sale [Abstract]
Revenues											0	2,279,000	5,604,000
Property operating expense											0	(331,000)	(1,330,000)
Depreciation and amortization											0	(90,000)	(476,000)
Net Income											$ 0	$ 1,858,000	$ 3,798,000