CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 17,582	$ 18,159
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	55,996	50,475
Gain on sale of real estate, land, other investments and discontinued operations	(6,999)	(3,452)
Gain on involuntary conversion	(2,480)	(2,263)
Impairment of real estate investments	6,658	0
Bad debt expense	346	893
Changes in other assets and liabilities:
Increase in receivable arising from straight-lining of rents	(2,179)	(2,319)
(Increase) decrease in accounts receivable	(3,483)	1,969
Increase in prepaid and other assets	(3,127)	(1,846)
Increase in tax, insurance and other escrow	(1,779)	(1,189)
Increase in deferred charges and leasing costs	(3,506)	(4,705)
Increase (decrease) in accounts payable, accrued expenses, and other liabilities	3,075	(478)
Net cash provided by operating activities	60,104	55,244
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from real estate deposits	926	1,193
Payments for real estate deposits	(4,232)	(1,095)
Decrease in holdbacks for improvements	2,186	1,514
Increase in holdbacks for improvements	(12,388)	(1,962)
Proceeds from sale of discontinued operations	78,879	3,909
Proceeds from sale of real estate and other investments	165	45
Insurance proceeds received	2,452	3,455
Payments for acquisitions of real estate assets	(33,662)	(43,283)
Payments for development and re-development of real estate assets	(97,288)	(38,194)
Payments for improvements of real estate assets	(25,815)	(21,525)
Net cash used by investing activities	(88,777)	(95,943)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from mortgages payable	40,733	57,030
Principal payments on mortgages payable	(81,432)	(84,359)
Proceeds from revolving line of credit and other debt	52,284	26,854
Principal payments on revolving line of credit and other debt	(17,443)	(34,550)
Proceeds from financing liability	7,900	0
Proceeds from sale of common shares, net of issue costs	0	2,448
Proceeds from sale of common shares under distribution reinvestment and share purchase program	33,160	24,300
Proceeds from underwritten Public Offering of Preferred Shares - Series B, net of offering costs	0	111,357
Repurchase of fractional shares and partnership units	0	(15)
Proceeds from noncontrolling partner - consolidated real estate entities	416	0
Distributions paid to common shareholders, net of reinvestment of $10,511 and $9,307, respectively	(30,174)	(26,626)
Distributions paid to preferred shareholders	(8,636)	(5,588)
Distributions paid to noncontrolling interests - Unitholders of the Operating Partnership, net of reinvestment of $482 and $465, respectively	(8,026)	(7,728)
Distributions paid to noncontrolling interests - consolidated real estate entities	(748)	(111)
Net cash (used) provided by financing activities	(11,966)	63,012
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(40,639)	22,313
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	94,133	39,989
CASH AND CASH EQUIVALENTS AT END OF PERIOD	53,494	62,302
SUPPLEMENTARY SCHEDULE OF NON-CASH INVESTING AND FINANCING
Distribution reinvestment plan	10,511	9,307
Operating partnership distribution reinvestment plan	482	465
Operating partnership units converted to shares	1,131	846
Shares issued under the Incentive Award Plan	112	398
Real estate assets acquired through the issuance of operating partnership units	3,480	10,116
Real estate assets acquired through assumption of indebtedness and accrued costs	0	12,500
Mortgages included in real estate dispositions	0	5,887
Adjustments to accounts payable included within real estate investments	(325)	(2,868)
Noncontrolling partnership interest	2,900	7,068
Involuntary conversion of assets due to flood and fire damage	7,052	107
Construction debt reclassified to mortgages payable	0	13,650
Forfeiture of note payable in conjunction with sale of property	600	0
Cash paid during the year for:
Cash paid for interest, net of amounts capitalized of $2,139 and $438, respectively	$ 40,845	$ 47,296