SUMMARIZED CONDENSED CONSOLIDATING INFORMATION (Condensed Consolidating Statement of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	$ 71,239	$ 49,211
Cash flows from investing activities:
Acquisitions of real estate	(721,879)	(6,175)
Acquisition of note receivable	(59,256)	(26,393)
Preferred equity investment	(11,300)	(6,624)
Additions to real estate	(1,151)	(388)
Repayment of loans receivable	287	0
Net proceeds from the sale of real estate	0	2,208
Distribution from subsidiaries		0
Investment in subsidiaries	0
Intercompany financing	0	0
Net cash used in investing activities	(793,299)	(37,372)
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes	350,000	200,000
Principal payments on senior unsecured notes	(211,250)	(113,750)
Proceeds from revolving credit facility	699,000	0
Payments on revolving credit facility	(220,500)	(92,500)
Proceeds from mortgage notes	57,703	0
Principal payments on mortgage notes	(88,419)	(10,081)
Payments of deferred financing costs	(15,474)	(8,598)
Issuance of preferred stock	0	138,257
Issuance of common stock	229,825	(2,950)
Dividends paid on common and preferred stock	(57,654)	(42,677)
Contributions from Parent	0
Distributions to Parent		0
Intercompany financing	0	0
Net cash provided by financing activities	743,231	67,701
Net increase in cash and cash equivalents	21,171	79,540
Cash and cash equivalents, beginning of period	4,308	17,101
Cash and cash equivalents, end of period	25,479	96,641
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	40,289	36,878
Cash flows from investing activities:
Acquisitions of real estate	0	0
Acquisition of note receivable	0	0
Preferred equity investment	0	0
Additions to real estate	0	0
Repayment of loans receivable	0
Net proceeds from the sale of real estate		0
Distribution from subsidiaries		3,345
Investment in subsidiaries	(12,288)
Intercompany financing	(182,248)	(52,041)
Net cash used in investing activities	(194,536)	(48,696)
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes	0	0
Principal payments on senior unsecured notes	0	0
Proceeds from revolving credit facility	0
Payments on revolving credit facility	0	0
Proceeds from mortgage notes	0
Principal payments on mortgage notes	0	0
Payments of deferred financing costs	0	0
Issuance of preferred stock		138,257
Issuance of common stock	229,825	(2,950)
Dividends paid on common and preferred stock	(57,654)	(42,677)
Contributions from Parent	0
Distributions to Parent		0
Intercompany financing	0	0
Net cash provided by financing activities	172,171	92,630
Net increase in cash and cash equivalents	17,924	80,812
Cash and cash equivalents, beginning of period	3,551	15,075
Cash and cash equivalents, end of period	21,475	95,887
Issuers [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	0	0
Cash flows from investing activities:
Acquisitions of real estate	0	0
Acquisition of note receivable	0	0
Preferred equity investment	0	0
Additions to real estate	0	0
Repayment of loans receivable	0
Net proceeds from the sale of real estate		0
Distribution from subsidiaries		3,345
Investment in subsidiaries	(12,288)
Intercompany financing	(915,786)	(132,883)
Net cash used in investing activities	(928,074)	(129,538)
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes	350,000	200,000
Principal payments on senior unsecured notes	(211,250)	(113,750)
Proceeds from revolving credit facility	604,000
Payments on revolving credit facility	0	0
Proceeds from mortgage notes	0
Principal payments on mortgage notes	0	0
Payments of deferred financing costs	(9,212)	(5,408)
Issuance of preferred stock		0
Issuance of common stock	0	0
Dividends paid on common and preferred stock	0	0
Contributions from Parent	12,288
Distributions to Parent		(3,345)
Intercompany financing	182,248	52,041
Net cash provided by financing activities	928,074	129,538
Net increase in cash and cash equivalents	0	0
Cash and cash equivalents, beginning of period	0	0
Cash and cash equivalents, end of period	0	0
Combined Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	0	0
Cash flows from investing activities:
Acquisitions of real estate	(713,778)	(6,175)
Acquisition of note receivable	(59,256)	(26,393)
Preferred equity investment	(11,300)	(6,624)
Additions to real estate	(1,128)	(388)
Repayment of loans receivable	287
Net proceeds from the sale of real estate		0
Distribution from subsidiaries		0
Investment in subsidiaries	0
Intercompany financing	0	0
Net cash used in investing activities	(785,175)	(39,580)
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes	0	0
Principal payments on senior unsecured notes	0	0
Proceeds from revolving credit facility	95,000
Payments on revolving credit facility	(220,500)	(92,500)
Proceeds from mortgage notes	0
Principal payments on mortgage notes	0	0
Payments of deferred financing costs	(5,111)	(3,011)
Issuance of preferred stock		0
Issuance of common stock	0	0
Dividends paid on common and preferred stock	0	0
Contributions from Parent	0
Distributions to Parent		0
Intercompany financing	915,786	135,091
Net cash provided by financing activities	785,175	39,580
Net increase in cash and cash equivalents	0	0
Cash and cash equivalents, beginning of period	0	0
Cash and cash equivalents, end of period	0	0
Combined Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	30,950	12,333
Cash flows from investing activities:
Acquisitions of real estate	(8,101)	0
Acquisition of note receivable	0	0
Preferred equity investment	0	0
Additions to real estate	(23)	0
Repayment of loans receivable	0
Net proceeds from the sale of real estate		2,208
Distribution from subsidiaries		0
Investment in subsidiaries	0
Intercompany financing	0	0
Net cash used in investing activities	(8,124)	2,208
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes	0	0
Principal payments on senior unsecured notes	0	0
Proceeds from revolving credit facility	0
Payments on revolving credit facility	0	0
Proceeds from mortgage notes	57,703
Principal payments on mortgage notes	(88,419)	(10,081)
Payments of deferred financing costs	(1,151)	(179)
Issuance of preferred stock		0
Issuance of common stock	0	0
Dividends paid on common and preferred stock	0	0
Contributions from Parent	12,288
Distributions to Parent		(3,345)
Intercompany financing	0	(2,208)
Net cash provided by financing activities	(19,579)	(15,813)
Net increase in cash and cash equivalents	3,247	(1,272)
Cash and cash equivalents, beginning of period	757	2,026
Cash and cash equivalents, end of period	4,004	754
Elimination [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	0	0
Cash flows from investing activities:
Acquisitions of real estate	0	0
Acquisition of note receivable	0	0
Preferred equity investment	0	0
Additions to real estate	0	0
Repayment of loans receivable	0
Net proceeds from the sale of real estate		0
Distribution from subsidiaries		(6,690)
Investment in subsidiaries	24,576
Intercompany financing	1,098,034	184,924
Net cash used in investing activities	1,122,610	178,234
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes	0	0
Principal payments on senior unsecured notes		0
Proceeds from revolving credit facility	0
Payments on revolving credit facility	0	0
Proceeds from mortgage notes	0
Principal payments on mortgage notes	0	0
Payments of deferred financing costs	0	0
Issuance of preferred stock		0
Issuance of common stock	0	0
Dividends paid on common and preferred stock	0	0
Contributions from Parent	(24,576)
Distributions to Parent		6,690
Intercompany financing	(1,098,034)	(184,924)
Net cash provided by financing activities	(1,122,610)	(178,234)
Net increase in cash and cash equivalents	0	0
Cash and cash equivalents, beginning of period	0	0
Cash and cash equivalents, end of period	$ 0	$ 0