SEGMENT REPORTING (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 segment	Jun. 30, 2013
Segment Reporting Information [Line Items]
Number of reportable segments			3
Revenues	$ 49,511	$ 40,808	$ 96,196	$ 83,097
Property operating expenses, other operating and real estate taxes	(12,214)	(10,044)	(25,695)	(21,027)
General and administrative	(6,879)	(6,302)	(13,775)	(11,928)
Depreciation and amortization	(11,584)	(9,599)	(23,171)	(18,828)
Operating income	18,834	14,863	33,555	31,314
Equity in (losses) earnings of unconsolidated affiliates	1,430	815	4,459	3,065
Impairment of asset	0	(1,500)	0	(1,500)
Loss on debt extinguishment	(66)	0	(269)	0
Gain on disposition of property	561	0	12,948	0
Interest and other finance expense	(9,534)	(9,926)	(20,185)	(19,211)
Income tax benefit (provision)	83	(10)	(85)	129
Income from continuing operations	11,308	4,242	30,423	13,797
Operating income from discontinued operations	0	1,181	0	2,805
Gain on disposition of property	560	4,191	560	4,191
Net income	11,868	9,614	30,983	20,793
(Income) loss from continuing operations	57	3,725	2,537	3,761
Income from discontinued operations	(461)	(4,582)	(461)	(6,174)
Net (income) loss attributable to noncontrolling interests	(404)	(857)	2,076	(2,413)
Net income attributable to Common Shareholders	11,464	8,757	33,059	18,380
Real Estate at Cost	1,982,629	1,610,422	1,982,629	1,610,422
Total Assets	2,372,196	2,310,544	2,372,196	2,310,544
Acquisition of Real Estate	17,100	22,500	107,600	109,100
Investment in Redevelopment and Improvements	30,806	25,626	68,311	43,567
Core Portfolio
Segment Reporting Information [Line Items]
Revenues	30,535	27,659	60,684	54,138
Property operating expenses, other operating and real estate taxes	(7,587)	(6,500)	(15,493)	(13,372)
General and administrative	(6,238)	(5,925)	(12,651)	(11,185)
Depreciation and amortization	(8,300)	(6,909)	(16,633)	(13,298)
Operating income	8,410	8,325	15,907	16,283
Equity in (losses) earnings of unconsolidated affiliates	227	(42)	323	(47)
Impairment of asset		(1,500)		(1,500)
Loss on debt extinguishment	(3)		(3)
Gain on disposition of property	0		12,387
Interest and other finance expense	(6,962)	(6,329)	(14,162)	(12,486)
Income tax benefit (provision)	91	146	(13)	238
Income from continuing operations	1,763	600	14,439	2,488
Operating income from discontinued operations		112		213
Gain on disposition of property	0	0	0	0
Net income	1,763	712	14,439	2,701
(Income) loss from continuing operations	(1,036)	(490)	(1,453)	(926)
Income from discontinued operations	(4)	(54)	(4)	(94)
Net (income) loss attributable to noncontrolling interests	(1,040)	(544)	(1,457)	(1,020)
Net income attributable to Common Shareholders	723	168	12,982	1,681
Real Estate at Cost	1,184,956	982,323	1,184,956	982,323
Total Assets	1,153,586	1,100,356	1,153,586	1,100,356
Acquisition of Real Estate	17,100	22,500	107,600	109,100
Investment in Redevelopment and Improvements	754	3,255	2,182	3,711
Opportunity Funds
Segment Reporting Information [Line Items]
Revenues	13,934	9,751	26,576	22,663
Property operating expenses, other operating and real estate taxes	(4,627)	(3,544)	(10,202)	(7,655)
General and administrative	(641)	(377)	(1,124)	(743)
Depreciation and amortization	(3,284)	(2,690)	(6,538)	(5,530)
Operating income	5,382	3,140	8,712	8,735
Equity in (losses) earnings of unconsolidated affiliates	1,203	857	4,136	3,112
Impairment of asset		0		0
Loss on debt extinguishment	(63)		(266)
Gain on disposition of property	561		561
Interest and other finance expense	(2,572)	(3,597)	(6,023)	(6,725)
Income tax benefit (provision)	(8)	(156)	(72)	(109)
Income from continuing operations	4,503	244	7,048	5,013
Operating income from discontinued operations		1,069		2,592
Gain on disposition of property	560	4,191	560	4,191
Net income	5,063	5,504	7,608	11,796
(Income) loss from continuing operations	1,093	4,215	3,990	4,687
Income from discontinued operations	(457)	(4,528)	(457)	(6,080)
Net (income) loss attributable to noncontrolling interests	636	(313)	3,533	(1,393)
Net income attributable to Common Shareholders	5,699	5,191	11,141	10,403
Real Estate at Cost	797,673	628,099	797,673	628,099
Total Assets	1,122,303	1,104,704	1,122,303	1,104,704
Acquisition of Real Estate	0	0	0	0
Investment in Redevelopment and Improvements	30,052	22,371	66,129	39,856
Structured Financing
Segment Reporting Information [Line Items]
Revenues	5,042	3,398	8,936	6,296
Property operating expenses, other operating and real estate taxes	0	0	0	0
General and administrative	0	0	0	0
Depreciation and amortization	0	0	0	0
Operating income	5,042	3,398	8,936	6,296
Equity in (losses) earnings of unconsolidated affiliates	0	0	0	0
Impairment of asset		0		0
Loss on debt extinguishment	0		0
Gain on disposition of property	0		0
Interest and other finance expense	0	0	0	0
Income tax benefit (provision)	0	0	0	0
Income from continuing operations	5,042	3,398	8,936	6,296
Operating income from discontinued operations		0		0
Gain on disposition of property	0	0	0	0
Net income	5,042	3,398	8,936	6,296
(Income) loss from continuing operations	0	0	0	0
Income from discontinued operations	0	0	0	0
Net (income) loss attributable to noncontrolling interests	0	0	0	0
Net income attributable to Common Shareholders	5,042	3,398	8,936	6,296
Real Estate at Cost	0	0	0	0
Total Assets	96,307	105,484	96,307	105,484
Acquisition of Real Estate	0	0	0	0
Investment in Redevelopment and Improvements	$ 0	$ 0	$ 0	$ 0