Consolidated Statements of Equity (USD $) In Thousands, except Share data, unless otherwise specified	Preferred Stock	Common Stock	Additional Paid-in Capital	Common Stock Dividends in Excess of Earnings	Accumulated Other Comprehensive Income (Loss)	Total Stockholders' Equity	Noncontrolling Interest - Unit holders in Operating Partnership	Total
Balance, beginning of period at Dec. 31, 2013	$ 139,000	$ 447	$ 577,039	$ (116,877)	$ 3,440	$ 603,049	$ 71,515	$ 674,564
Balance, beginning of period (in shares) at Dec. 31, 2013		44,764,377
Increase (Decrease) in Stockholders' Equity
Proceeds from sale of common stock		34	77,534			77,568		77,568
Proceeds from sale of common stock (in shares)		3,431,459
Offering costs			(1,270)			(1,270)		(1,270)
Issuance of restricted stock, net		1	(1)
Issuance of restricted stock, net (in shares)		101,934
Issuance of common stock (in shares)		2,544
Dividends and distributions, net	(2,712)			(14,540)		(17,252)	(2,238)	(19,490)
Non-cash compensation			441			441	618	1,059
Issuance of units							342	342
Rebalancing of noncontrolling interest			(6,899)			(6,899)	6,899
Other comprehensive loss					(936)	(936)	(146)	(1,082)
Net income (loss)	2,712			(2,327)		385	(364)	21
Balance, end of period at Mar. 31, 2014	139,000	482	646,844	(133,744)	2,504	655,086	75,942	731,028
Balance, end of period (in shares) at Mar. 31, 2014		48,300,314
Balance, beginning of period at Dec. 31, 2014	139,000	644	928,242	(203,241)	(489)	864,156	27,368	891,524
Balance, beginning of period (in shares) at Dec. 31, 2014		64,434,852
Increase (Decrease) in Stockholders' Equity
Proceeds from sale of common stock		4	10,129			10,133		10,133
Proceeds from sale of common stock (in shares)		417,115
Offering costs			(202)			(202)		(202)
Issuance of restricted stock, net		1	(1)
Issuance of restricted stock, net (in shares)		92,119
Issuance of common stock (in shares)		3,298
Dividends and distributions, net	(2,712)			(21,824)		(24,536)	(1,120)	(25,656)
Non-cash compensation			710			710	1,137	1,847
Redemption of common units for cash							(64)	(64)
Issuance of units							21,902	21,902
Rebalancing of noncontrolling interest			10,589			10,589	(10,589)
Other comprehensive loss					(3,813)	(3,813)	(192)	(4,005)
Net income (loss)	2,712			(3,941)		(1,229)	(198)	(1,427)
Balance, end of period at Mar. 31, 2015	$ 139,000	$ 649	$ 949,467	$ (229,006)	$ (4,302)	$ 855,808	$ 38,244	$ 894,052
Balance, end of period (in shares) at Mar. 31, 2015		64,947,384