SUMMARIZED CONDENSED CONSOLIDATING INFORMATION (Condensed Consolidating Statement of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	$ 28,921	$ 22,986
Cash flows from investing activities:
Acquisitions of real estate	(118,389)	(6,175)
Acquisition of note receivable	(38,373)	(25,244)
Preferred equity investment	(6,458)	(5,144)
Additions to real estate	(783)	(226)
Net proceeds from the sale of real estate	0	2,208
Investment in Subsidiary	0	0
Distribution from Subsidiary		0
Intercompany financing	0	0
Net cash used in investing activities	(164,003)	(34,581)
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 secured revolving credit facility	80,000	0
Payments on secured revolving credit facility	(215,500)	(92,500)
Proceeds from mortgage notes	57,703	0
Principal payments on mortgage notes	(87,733)	(9,193)
Payments of deferred financing costs	(10,135)	(5,378)
Issuance of preferred stock	0	138,345
Issuance of common stock	219,899	(2,851)
Dividends paid on common and preferred stock	(37,125)	(27,409)
Contributions from Parent	0
Distributions to Parent		0
Intercompany financing	0	0
Net cash provided by financing activities	145,859	87,264
Net increase in cash and cash equivalents	10,777	75,669
Cash and cash equivalents, beginning of period	4,308	17,101
Cash and cash equivalents, end of period	15,085	92,770
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(1,746)	12,200
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
Net proceeds from the sale of real estate		0
Investment in Subsidiary	(12,122)	0
Distribution from Subsidiary		1,920
Intercompany financing	(160,248)	(46,072)
Net cash used in investing activities	(172,370)	(44,152)
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes	0	0
Principal payments on senior unsecured notes	0	0
Proceeds from secured revolving credit facility	0
Payments on secured 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		138,345
Issuance of common stock	219,899	(2,851)
Dividends paid on common and preferred stock	(37,125)	(27,409)
Contributions from Parent	0
Distributions to Parent		0
Intercompany financing	0	0
Net cash provided by financing activities	182,774	108,085
Net increase in cash and cash equivalents	8,658	76,133
Cash and cash equivalents, beginning of period	3,551	15,075
Cash and cash equivalents, end of period	12,209	91,208
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
Net proceeds from the sale of real estate		0
Investment in Subsidiary	(12,122)	0
Distribution from Subsidiary		1,920
Intercompany financing	(289,776)	(127,163)
Net cash used in investing activities	(301,898)	(125,243)
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 secured revolving credit facility	0
Payments on secured revolving credit facility	0	0
Proceeds from mortgage notes	0
Principal payments on mortgage notes	0	0
Payments of deferred financing costs	(9,222)	(5,159)
Issuance of preferred stock		0
Issuance of common stock	0	0
Dividends paid on common and preferred stock	0	0
Contributions from Parent	12,122
Distributions to Parent		(1,920)
Intercompany financing	160,248	46,072
Net cash provided by financing activities	301,898	125,243
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	(108,650)	(6,175)
Acquisition of note receivable	(38,373)	(25,244)
Preferred equity investment	(6,458)	(5,144)
Additions to real estate	(783)	(226)
Net proceeds from the sale of real estate		0
Investment in Subsidiary	0	0
Distribution from Subsidiary		0
Intercompany financing	0	0
Net cash used in investing activities	(154,264)	(36,789)
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes	0	0
Principal payments on senior unsecured notes	0	0
Proceeds from secured revolving credit facility	80,000
Payments on secured revolving credit facility	(215,500)	(92,500)
Proceeds from mortgage notes	0
Principal payments on mortgage notes	0	0
Payments of deferred financing costs	(12)	(82)
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	289,776	129,371
Net cash provided by financing activities	154,264	36,789
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	30,667	10,786
Cash flows from investing activities:
Acquisitions of real estate	(9,739)	0
Acquisition of note receivable	0	0
Preferred equity investment	0	0
Additions to real estate	0	0
Net proceeds from the sale of real estate		2,208
Investment in Subsidiary	0	0
Distribution from Subsidiary		0
Intercompany financing	0	0
Net cash used in investing activities	(9,739)	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 secured revolving credit facility	0
Payments on secured revolving credit facility	0	0
Proceeds from mortgage notes	57,703
Principal payments on mortgage notes	(87,733)	(9,193)
Payments of deferred financing costs	(901)	(137)
Issuance of preferred stock		0
Issuance of common stock	0	0
Dividends paid on common and preferred stock	0	0
Contributions from Parent	12,122
Distributions to Parent		(1,920)
Intercompany financing	0	(2,208)
Net cash provided by financing activities	(18,809)	(13,458)
Net increase in cash and cash equivalents	2,119	(464)
Cash and cash equivalents, beginning of period	757	2,026
Cash and cash equivalents, end of period	2,876	1,562
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
Net proceeds from the sale of real estate		0
Investment in Subsidiary	24,244	0
Distribution from Subsidiary		(3,840)
Intercompany financing	450,024	173,235
Net cash used in investing activities	474,268	169,395
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes	0	0
Principal payments on senior unsecured notes		0
Proceeds from secured revolving credit facility	0
Payments on secured 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	(24,244)
Distributions to Parent		3,840
Intercompany financing	(450,024)	(173,235)
Net cash provided by financing activities	(474,268)	(169,395)
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