DISCONTINUED OPERATIONS Reconciliation of Assets and Liabilities of Discontinued Operations (Details) - USD ($) $ in Thousands	Oct. 31, 2016	Apr. 30, 2016
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	$ 69,326	$ 77,488
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	157,050	189,900
Receivable arising from straight-lining of rents	8,800	9,805
Accounts receivable	912	1,707
Prepaid and other assets	34	43
Tax, insurance and other escrow	781	670
Property and equipment	471	479
Goodwill	18	18
Total major classes of assets of the discontinued operations	168,066	202,622
Other assets included in the disposal group classified as held for sale	23,167	17,915
Total assets of the disposal groups classified as held for sale on the balance sheet	191,233	220,537
Carrying amounts of major classes of liabilities included as part of discontinued operations [Abstract]
Accounts payable and accrued expenses	352	810
Mortgages payable	53,829	67,940
Other	7,900	7,900
Total major classes of liabilities of the discontinued operations	62,081	76,650
Other liabilities included in the disposal group classified as held for sale	7,245	838
Total liabilities of the disposal groups classified as held for sale on the balance sheet	$ 69,326	$ 77,488