DISCONTINUED OPERATIONS Reconciliation of Assets and Liabilities of Discontinued Operations (Details) - USD ($) $ in Thousands	Apr. 30, 2016	Apr. 30, 2015
Carrying amounts of major classes of liabilities included as part of discontinued operations [Abstract]
Total liabilities of the disposal groups classified as held for sale on the balance sheet	$ 77,712	$ 401,299
Discontinued Operations, Held-for-sale [Member]
Carrying amounts of major classes of assets included as part of discontinued operations [Abstract]
Property owned and intangible assets, net of accumulated depreciation and amortization	189,900	592,780
Receivable arising from straight-lining of rents	9,805	19,191
Accounts receivable	1,707	1,041
Prepaid and other assets	43	739
Intangible asset	0	25,879
Tax, insurance and other escrow	670	1,750
Property and equipment	479	515
Goodwill	18	193
Deferred charges and leasing costs	222	9,936
Total major classes of assets of the discontinued operations	202,844	652,024
Other assets included in the disposal group classified as held for sale	17,917	23,740
Total assets of the disposal groups classified as held for sale on the balance sheet	220,761	675,764
Carrying amounts of major classes of liabilities included as part of discontinued operations [Abstract]
Accounts payable and accrued expenses	810	14,811
Mortgages payable	68,162	366,824
Other	7,900	7,904
Total major classes of liabilities of the discontinued operations	76,872	389,539
Other liabilities included in the disposal group classified as held for sale	840	11,760
Total liabilities of the disposal groups classified as held for sale on the balance sheet	$ 77,712	$ 401,299