DISCONTINUED OPERATIONS Reconciliation of Assets and Liabilities of Discontinued Operations (Details) - USD ($) $ in Thousands	Jul. 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	$ 76,195	$ 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	193,169	189,900
Receivable arising from straight-lining of rents	10,000	9,805
Accounts receivable	1,628	1,707
Prepaid and other assets	33	43
Tax, insurance and other escrow	723	670
Property and equipment	464	479
Goodwill	18	18
Total major classes of assets of the discontinued operations	206,035	202,622
Other assets included in the disposal group classified as held for sale	9,782	17,915
Total assets of the disposal groups classified as held for sale on the balance sheet	215,817	220,537
Carrying amounts of major classes of liabilities included as part of discontinued operations [Abstract]
Accounts payable and accrued expenses	612	810
Mortgages payable	67,179	67,940
Other	7,900	7,900
Total major classes of liabilities of the discontinued operations	75,691	76,650
Other liabilities included in the disposal group classified as held for sale	504	838
Total liabilities of the disposal groups classified as held for sale on the balance sheet	$ 76,195	$ 77,488