CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jan. 31, 2016	Jan. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 64,847	$ 14,822
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	43,811	39,198
Depreciation and amortization from discontinued operations	5,425	14,385
(Gain) Loss on sale of real estate, land, other investments and discontinued operations	(25,512)	811
Gain on extinguishment of debt	(35,552)	0
Share-based compensation expense	1,391	1,935
Impairment of real estate investments	3,760	6,105
Bad debt expense	392	840
Changes in other assets and liabilities:
Receivable arising from straight-lining of rents	(104)	(244)
Accounts receivable	301	2,217
Prepaid and other assets	(265)	(1,140)
Tax, insurance and other escrow	(193)	(548)
Deferred charges and leasing costs	(999)	(2,716)
Accounts payable, accrued expenses, and other liabilities	(10,363)	5,109
Net cash provided by operating activities	46,939	80,774
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from real estate deposits	3,725	575
Payments for real estate deposits	(2,486)	(7,924)
Decrease in other investments	279	0
Decrease in lender holdbacks for improvements	3,906	11,063
Increase in lender holdbacks for improvements	(862)	(913)
Proceeds from sale of discontinued operations	366,125	0
Proceeds from sale of real estate and other investments	8,580	26,758
Insurance proceeds received	1,035	2,537
Payments for acquisitions of real estate assets	(71,381)	(24,404)
Payments for development and re-development of real estate assets	(106,306)	(143,256)
Payments for improvements of real estate assets	(20,692)	(18,203)
Payments for improvements of real estate assets from discontinued operations	(5,182)	(6,478)
Net cash provided (used) by investing activities	176,741	(160,245)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from mortgages payable	95,602	78,875
Principal payments on mortgages payable	(218,264)	(83,198)
Proceeds from revolving lines of credit	43,000	45,000
Principal payments on revolving lines of credit and other debt	(110,554)	(17,000)
Proceeds from construction debt	62,268	69,051
Proceeds from sale of common shares under distribution reinvestment and share purchase program	1,493	38,819
Proceeds from noncontrolling partner - consolidated real estate entities	1,120	1,916
Repurchase of common shares	(35,000)	0
Distributions paid to common shareholders	(44,326)	(33,672)
Distributions paid to preferred shareholders	(8,636)	(8,636)
Distributions paid to noncontrolling interests - Unitholders of the Operating Partnership	(5,301)	(6,247)
Distributions paid to noncontrolling interests - consolidated real estate entities	(6,935)	(556)
Net cash (used) provided by financing activities	(225,533)	84,352
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(1,853)	4,881
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	48,970	47,267
CASH AND CASH EQUIVALENTS AT END OF PERIOD	47,117	52,148
SUPPLEMENTARY SCHEDULE OF NON-CASH INVESTING AND FINANCING ACTIVITIES FOR THE PERIOD
Distribution reinvestment plan - shares issued	3,997	11,550
Operating partnership distribution reinvestment plan - shares issued	130	506
Operating partnership units converted to shares	980	38,512
Real estate assets acquired through the issuance of operating partnership units	400	100
Real estate assets acquired through assumption of indebtedness and accrued costs	0	12,169
(Decrease) Increase to accounts payable included within real estate investments	(4,991)	6,384
Real estate assets contributed by noncontrolling interest - consolidated real estate entities	0	6,624
Construction debt reclassified to mortgages payable	41,649	0
Decrease in real estate assets in connection with transfer of real estate assets in settlement of debt	87,213	0
Decrease in debt in connection with transfer of real estate assets in settlement of debt	122,610	0
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid for interest, net of amounts capitalized of $4,396 and $3,628, respectively	$ 28,990	$ 39,073