DISCONTINUED OPERATIONS - Reconciliation of Assets and Liabilities of Discontinued Operations (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Apr. 30, 2018	Apr. 30, 2017
Carrying amounts of major classes of liabilities included as part of discontinued operations
Total liabilities of the disposal group classified as held for sale on the balance sheet	$ 0	$ 0	$ 130,904
Discontinued Operations, Held-for-sale
Carrying amounts of major classes of assets included as part of discontinued operations
Property owned and intangible assets, net of accumulated depreciation and amortization			255,466
Restricted cash			728
Other Assets			12,750
Total major classes of assets of the discontinued operations			268,944
Other assets included in the disposal group classified as held for sale			14,079
Total assets of the disposal group classified as held for sale on the balance sheet			283,023
Carrying amounts of major classes of liabilities included as part of discontinued operations
Accounts payable and accrued expenses			4,835
Mortgages payable			112,208
Other			7,977
Total major classes of liabilities of the discontinued operations			125,020
Other liabilities included in the disposal group classified as held for sale			5,884
Total liabilities of the disposal group classified as held for sale on the balance sheet			$ 130,904