Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Document Fiscal Year Focus	2014	2013	2012
REVENUES:
Rental property revenues	$ 343,910	$ 194,420	$ 114,208
Fee income	12,519	10,891	17,797
Other	4,954	5,430	4,841
Total consolidated revenues	361,383	210,741	136,846
COSTS AND EXPENSES:
Rental property operating expenses	155,934	90,498	50,329
Reimbursed expenses	3,652	5,215	7,063
General and administrative expenses	19,784	21,940	23,208
Interest expense	29,110	21,709	23,933
Depreciation and amortization	140,018	76,277	39,424
Separation expenses	185	520	1,985
Acquisition and related costs	1,130	7,484	793
Other	3,544	3,693	5,632
Total costs and expenses	353,357	227,336	152,367
Gains (Losses) on Extinguishment of Debt			(94)
Income (loss) from continuing operations before taxes, unconsolidated joint ventures, and sale of investment properties	8,026	(16,595)	(15,615)
Benefit (provision) for income taxes from operations	20	23	(91)
INCOME (LOSS) FROM UNCONSOLIDATED JOINT VENTURES	11,268	67,325	39,258
Income (Loss) from Continuing Operations Before Gain on Sale of Investment Properties	19,314	50,753	23,552
GAIN ON SALE OF INVESTMENT PROPERTIES	12,536	61,288	4,053
INCOME (LOSS) FROM CONTINUING OPERATIONS	31,850	112,041	27,605
Income from discontinued operations:
Income from discontinued operations	1,800	3,299	1,907
Gain on sale from discontinued operations	19,358	11,489	18,407
Total income from discontinued operations	21,158	14,788	20,314
Net income	53,008	126,829	47,919
Net income attributable to noncontrolling interests	(1,004)	(5,068)	(2,191)
Net Income (Loss) in Statement on Equity			49,922
Net income attributable to controlling interests	52,004	121,761	45,728
Preferred Share Original Issuance Costs	(3,530)	(2,656)
Dividends to preferred stockholders	(2,955)	(10,008)	(12,907)
Net income available to common stockholders	$ 45,519	$ 109,097	$ 32,821
PER COMMON SHARE INFORMATION - BASIC AND DILUTED:
Income (loss) from continuing operations attributable to controlling interest (dollars per share)	$ 0.12	$ 0.66	$ 0.12
Income from discontinued operations (dollars per share)	$ 0.10	$ 0.10	$ 0.20
Net income (loss) available to common stockholders (dollars per share)	$ 0.22	$ 0.76	$ 0.32
WEIGHTED AVERAGE SHARES—BASIC (shares)	204,216	144,255	104,117
WEIGHTED AVERAGE SHARES—DILUTED (shares)	204,460	144,420	104,125