Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
REVENUES:
Rental property revenues	$ 96,177	$ 80,034	$ 186,216	$ 157,518
Fee income	1,704	2,025	3,520	4,363
Other	22	2,446	143	4,347
Total consolidated revenues	97,903	84,505	189,879	166,228
COSTS AND EXPENSES:
Rental property operating expenses	41,387	35,959	79,340	70,816
Reimbursed expenses	717	988	1,828	1,920
General and administrative expenses	5,936	5,756	9,431	11,366
Interest expense	7,869	6,970	15,546	14,137
Depreciation and amortization	34,879	35,135	71,026	69,274
Separation expenses	0	0	102	84
Acquisition and related costs	2	149	85	171
Other	341	877	698	1,370
Total costs and expenses	91,131	85,834	178,056	169,138
Income (loss) from continuing operations before taxes, unconsolidated joint ventures, and sale of investment properties	6,772	(1,329)	11,823	(2,910)
Benefit for income taxes from operations	0	9	0	21
Income from unconsolidated joint ventures	1,761	2,027	3,372	3,313
Income from continuing operations before gain on sale of investment properties	8,533	707	15,195	424
Gain (loss) on sale of investment properties	(576)	1,327	530	1,488
Income from continuing operations	7,957	2,034	15,725	1,912
INCOME (LOSS) FROM DISCONTINUED OPERATIONS:
Income (loss) from discontinued operations	(6)	566	(19)	1,457
Gain (loss) on sale from discontinued operations	0	14	(551)	6,379
Total income from discontinued operations	(6)	580	(570)	7,836
Net income	7,951	2,614	15,155	9,748
Net income attributable to noncontrolling interests	0	(129)	0	(284)
Net income attributable to controlling interests	7,951	2,485	15,155	9,464
Dividends to preferred stockholders	0	(1,178)	0	(2,955)
Preferred Share Original Issuance Costs	0	3,530	0	3,530
Net income (loss) available to common stockholders	$ 7,951	$ (2,223)	$ 15,155	$ 2,979
PER COMMON SHARE INFORMATION - BASIC AND DILUTED:
Income (loss) from continuing operations attributable to controlling interest	$ 0.04	$ (0.01)	$ 0.07	$ (0.02)
Income from discontinued operations	0.00	0.00	0.00	0.04
Net income (loss) available to common stockholders	$ 0.04	$ (0.01)	$ 0.07	$ 0.02
Weighted average shares — basic	216,630	198,440	216,599	195,108
Weighted average shares — diluted	216,766	198,440	216,753	195,347
Dividends declared per common share	$ 0.080	$ 0.075	$ 0.160	$ 0.150
Total Segment [Member]
REVENUES:
Total consolidated revenues	$ 97,903
COSTS AND EXPENSES:
Reimbursed expenses	717	$ 988	$ 1,828	$ 1,920
Separation expenses			102	84
INCOME (LOSS) FROM DISCONTINUED OPERATIONS:
Dividends to preferred stockholders		(4,708)		(6,485)
Net income (loss) available to common stockholders	$ 7,951	$ (2,223)	$ 15,155	$ 2,979