SUMMARIZED CONDENSED CONSOLIDATING INFORMATION (Condensed Consolidating Statement of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	$ 47,902	$ 34,509
Cash flows from investing activities:
Acquisitions of real estate	(98,050)	(187,700)
Acquisition of note receivable	0	(5,348)
Origination of note receivable	(22,111)	0
Additions to real estate	(1,039)	(86)
Investment in Subsidiary	0	0
Distribution from Subsidiary	0	0
Intercompany financing	0	0
Net cash used in investing activities	(121,200)	(193,134)
Cash flows from financing activities:
Proceeds from secured revolving credit facility	42,500
Proceeds from mortgage notes payables	35,829	0
Proceeds from issuance of senior unsecured notes	106,000	0
Payments on secured revolving credit facility	(42,500)	0
Principal payments on mortgage notes payable	(36,701)	(2,249)
Payments of deferred financing costs	(7,045)	(495)
Issuance of common stock	144	163,431
Dividends paid	(36,702)	(19,878)
Contributions from Parent	0	0
Distributions to Parent	0	0
Intercompany financing	0	0
Net cash provided by (used in) financing activities	(61,525)	(140,809)
Net decrease in cash and cash equivalents	(11,773)	(17,816)
Cash and cash equivalents, beginning of period	42,250	74,233
Cash and cash equivalents, end of period	30,477	56,417
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	44,798	32,101
Cash flows from investing activities:
Acquisitions of real estate	0	0
Acquisition of note receivable		(5,348)
Origination of note receivable	0
Additions to real estate	(7)	(86)
Investment in Subsidiary	(1,759)	(163,984)
Distribution from Subsidiary	(345)	(3,307)
Intercompany financing	20,764	24,261
Net cash used in investing activities	(22,185)	(190,372)
Cash flows from financing activities:
Proceeds from secured revolving credit facility	0
Proceeds from mortgage notes payables	0
Proceeds from issuance of senior unsecured notes	0
Principal payments on mortgage notes payable	0	0
Payments of deferred financing costs	0	0
Issuance of common stock	144	163,431
Dividends paid	(36,702)	(19,878)
Contributions from Parent	0	0
Distributions to Parent	0	0
Intercompany financing	0	0
Net cash provided by (used in) financing activities	36,558	(143,553)
Net decrease in cash and cash equivalents	(13,945)	(14,718)
Cash and cash equivalents, beginning of period	41,736	70,841
Cash and cash equivalents, end of period	27,791	56,123
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
Origination of note receivable	0
Additions to real estate	0	0
Investment in Subsidiary	(1,759)	(50)
Distribution from Subsidiary	(345)	(3,307)
Intercompany financing	123,775	187,700
Net cash used in investing activities	(125,189)	(184,443)
Cash flows from financing activities:
Proceeds from secured revolving credit facility	0
Proceeds from mortgage notes payables	0
Proceeds from issuance of senior unsecured notes	106,000
Principal payments on mortgage notes payable	0	0
Payments of deferred financing costs	(2,989)	(495)
Issuance of common stock	0	0
Dividends paid	0	0
Contributions from Parent	(1,759)	(163,984)
Distributions to Parent	345	3,307
Intercompany financing	(20,764)	(24,261)
Net cash provided by (used in) financing activities	(125,189)	(184,443)
Net decrease 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	(98,050)	(187,700)
Acquisition of note receivable		0
Origination of note receivable	(22,111)
Additions to real estate	(1,032)	0
Investment in Subsidiary	0	0
Distribution from Subsidiary	0	0
Intercompany financing	0	0
Net cash used in investing activities	(121,193)	(187,700)
Cash flows from financing activities:
Proceeds from secured revolving credit facility	42,500
Proceeds from mortgage notes payables	0
Proceeds from issuance of senior unsecured notes	0
Payments on secured revolving credit facility	(42,500)
Principal payments on mortgage notes payable	0	0
Payments of deferred financing costs	(2,582)	0
Issuance of common stock	0	0
Dividends paid	0	0
Contributions from Parent	0	0
Distributions to Parent	0	0
Intercompany financing	(123,775)	(187,700)
Net cash provided by (used in) financing activities	(121,193)	(187,700)
Net decrease 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	3,104	2,408
Cash flows from investing activities:
Acquisitions of real estate	0	0
Acquisition of note receivable		0
Origination of note receivable	0
Additions to real estate	0	0
Investment in Subsidiary	0	0
Distribution from Subsidiary	0	0
Intercompany financing	0	0
Net cash used in investing activities	0	0
Cash flows from financing activities:
Proceeds from secured revolving credit facility	0
Proceeds from mortgage notes payables	35,829
Proceeds from issuance of senior unsecured notes	0
Principal payments on mortgage notes payable	(36,701)	(2,249)
Payments of deferred financing costs	(1,474)	0
Issuance of common stock	0	0
Dividends paid	0	0
Contributions from Parent	(1,759)	(50)
Distributions to Parent	345	3,307
Intercompany financing	0	0
Net cash provided by (used in) financing activities	932	5,506
Net decrease in cash and cash equivalents	2,172	(3,098)
Cash and cash equivalents, beginning of period	514	3,392
Cash and cash equivalents, end of period	2,686	294
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
Origination of note receivable	0
Additions to real estate	0	0
Investment in Subsidiary	3,518	(164,034)
Distribution from Subsidiary	690	(6,614)
Intercompany financing	(144,539)	211,961
Net cash used in investing activities	147,367	(369,381)
Cash flows from financing activities:
Proceeds from secured revolving credit facility	0
Proceeds from mortgage notes payables	0
Principal payments on mortgage notes payable	0	0
Payments of deferred financing costs	0	0
Issuance of common stock	0	0
Dividends paid	0	0
Contributions from Parent	3,518	(164,034)
Distributions to Parent	(690)	6,614
Intercompany financing	144,539	(211,961)
Net cash provided by (used in) financing activities	147,367	(369,381)
Net decrease 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