Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Total Stockholder's Equity	Preferred Stock	Common Shares	Additional Paid in Capital	Common Stock Dividends in excess of Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interest - Unit holders in Operating Partnership
Balance at Dec. 31, 2011	$ 309,909	$ 230,693	$ 69,000	$ 159	$ 179,919	$ (18,385)		$ 79,216
Balance (in shares) at Dec. 31, 2011				15,901,560
Increase (Decrease) in Stockholders' Equity
Issuance of restricted stock, net				1	(1)
Issuance of restricted stock, net (in shares)				87,025
Issuance of common stock (in shares)				4,465
Dividends and distributions, net	(7,793)	(5,711)	(1,553)			(4,158)		(2,082)
Non-cash compensation	492	251			251			241
Rebalancing of noncontrolling interest		(1,093)			(1,093)			1,093
Net income (loss)	(1,361)	(389)	1,553			(1,942)		(972)
Balance at Mar. 31, 2012	301,247	223,751	69,000	160	179,076	(24,485)		77,496
Balance (in shares) at Mar. 31, 2012				15,993,050
Balance at Dec. 31, 2012	489,460	427,605	69,000	357	419,643	(61,024)	(371)	61,855
Balance (in shares) at Dec. 31, 2012				35,698,582
Increase (Decrease) in Stockholders' Equity
Proceeds from sales of common stock	117,539	117,539		64	117,475
Proceeds from sales of common stock (in shares)				6,423,352
Offering costs	(5,149)	(5,149)			(5,149)
Issuance of restricted stock, net				1	(1)
Issuance of restricted stock, net (in shares)				96,287
Issuance of common stock (in shares)				2,851
Dividends and distributions, net	(16,110)	(14,206)	(1,553)			(12,653)		(1,904)
Non-cash compensation	743	341			341			402
Rebalancing of noncontrolling interest		(7,466)			(7,466)			7,466
Comprehensive income	11	10					10	1
Net income (loss)	(418)	(153)	1,553			(1,706)		(265)
Balance at Mar. 31, 2013	$ 586,076	$ 518,521	$ 69,000	$ 422	$ 524,843	$ (75,383)	$ (361)	$ 67,555
Balance (in shares) at Mar. 31, 2013				42,221,072