Consolidated Statements Of Equity (USD $) In Thousands, except Share data	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Total
Beginning balance at Dec. 31, 2011		$ 91	$ 168,039	$ (9,119)		$ 159,011
Beginning balance, Shares at Dec. 31, 2011		9,308,670
Net income				4,065		4,065
Issuance of common stock, net of issuance costs, Shares		4,083,269
Issuance of common stock, net of issuance costs		42	55,007			55,049
Repurchase of common stock, Shares		(4,917)
Repurchase of common stock			(79)			(79)
Issuance of restricted stock, Shares		47,536
Issuance of preferred stock	46,000		(1,729)			44,271
Stock-based compensation			739			739
Common stock dividends			(6,178)			(6,178)
Preferred stock dividends			(1,604)			(1,604)
Ending balance at Dec. 31, 2012	46,000	133	214,195	(5,054)		255,274
Ending balance, Shares at Dec. 31, 2012		13,434,558
Net income				6,641		6,641
Issuance of common stock, net of issuance costs, Shares		11,515,793
Issuance of common stock, net of issuance costs		116	190,632			190,748
Repurchase of common stock, Shares		(9,122)
Repurchase of common stock			(160)			(160)
Issuance of restricted stock, Shares		48,891
Stock-based compensation			1,203			1,203
Common stock dividends			(11,306)			(11,306)
Preferred stock dividends			(1,978)	(1,587)		(3,565)
Ending balance at Dec. 31, 2013	46,000	249	392,586			438,835
Ending balance, Shares at Dec. 31, 2013		24,990,120
Net income				10,718		10,718
Issuance of common stock, net of issuance costs, Shares		17,841,140
Issuance of common stock, net of issuance costs		179	319,302			319,481
Repurchase of common stock, Shares		(12,943)
Repurchase of common stock			(284)			(284)
Issuance of restricted stock, Shares		51,146
Stock-based compensation			1,378			1,378
Common stock dividends			(12,227)	(7,153)		(19,380)
Preferred stock dividends				(3,565)		(3,565)
Other comprehensive loss					(147)	(147)
Ending balance at Dec. 31, 2014	$ 46,000	$ 428	$ 700,755		$ (147)	$ 747,036
Ending balance, Shares at Dec. 31, 2014		42,869,463