CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($)	3 Months Ended
	Jul. 31, 2018	Jul. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 3,716,000	$ (13,279,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization, including amortization of capitalized loan costs	18,944,000	25,616,000
Depreciation and amortization from discontinued operations, including amortization of capitalized loan costs	0	3,622,000
Gain on sale of real estate, land, other investments and discontinued operations	(9,794,000)	(124,000)
Loss on extinguishment of debt	482,000	133,000
Share-based compensation expense	114,000	376,000
Impairment of real estate investments	0	256,000
Other, net	399,000	171,000
Changes in other assets and liabilities:
Other assets	850,000	950,000
Accounts payable and accrued expenses	13,000	(1,974,000)
Net cash provided by operating activities	14,724,000	15,747,000
CASH FLOWS FROM INVESTING ACTIVITIES
Principal proceeds on mortgage loans receivable	425,000	0
Increase in notes receivable	(736,000)	(3,000,000)
Proceeds from sale of real estate and other investments	49,276,000	3,300,000
Insurance proceeds received	632,000	542,000
Payments for acquisitions of real estate assets	(585,000)	(61,734,000)
Payments for development and re-development of real estate assets	0	(2,219,000)
Payments for improvements of real estate assets	(5,094,000)	(4,984,000)
Payments for improvements of real estate assets from discontinued operations	0	(503,000)
Net cash provided by (used by) investing activities	43,918,000	(68,598,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments on mortgages payable, including prepayment penalties	(46,150,000)	(25,406,000)
Proceeds from revolving lines of credit	27,000,000	72,350,000
Principal payments on revolving lines of credit	(21,000,000)	(3,500,000)
Proceeds from construction debt	0	1,606,000
Repurchase of common shares	(615,000)	(3,936,000)
Repurchase of partnership units	(480,000)	(5,735,000)
Distributions paid to common shareholders	(8,358,000)	(8,444,000)
Distributions paid to preferred shareholders	(1,705,000)	(2,285,000)
Distributions paid to noncontrolling interests – Unitholders of the Operating Partnership	(987,000)	(1,065,000)
Distributions paid to noncontrolling interests – consolidated real estate entities	(2,099,000)	(20,000)
Net cash provided by (used by) financing activities	(54,394,000)	23,565,000
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	4,248,000	(29,286,000)
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT BEGINNING OF PERIOD	16,116,000	56,800,000
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT END OF PERIOD	20,364,000	27,514,000
SUPPLEMENTARY SCHEDULE OF NON-CASH INVESTING AND FINANCING ACTIVITIES
Operating partnership units converted to shares	291,000	0
Decrease to accounts payable included within real estate investments	(806,000)	(1,377,000)
Notes and accounts receivable converted to equity	670,000	0
Construction debt reclassified to mortgages payable	0	23,300,000
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid for interest	$ 8,014,000	$ 8,125,000