Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Numerator:
Net income	$ 3,800	$ 5,887	$ 10,603	$ 15,215
Preferred dividend		(380)		(2,194)
Warrant amortization		(1,163)		(1,545)
Net income available to common shareholders	3,800	4,344	10,603	11,476
Earnings allocated to participating securities	(40)		(88)
Numerator for basic earnings per common share	3,760	4,344	10,515	11,476
Effect of reallocating undistributed earnings of participating securities	40		88
Numerator for diluted earnings per common share	$ 3,800	$ 4,344	$ 10,603	$ 11,476
Denominator:
Weighted average common shares outstanding	19,697,267	19,447,952	19,660,698	19,446,716
Earnings per common share:
Basic	$ 0.19	$ 0.22	$ 0.53	$ 0.59
Diluted	$ 0.19	$ 0.22	$ 0.54	$ 0.59
Stock Options [Member]
Computation of basic and diluted earnings per common share
Antidilutive options to purchase common shares			0	5,000
Warrant [Member]
Effect of dilutive securities:
Warrant			703,753