Earnings Per Share (Details 2) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income/ (Loss) (numerator)
Net income applicable to earnings per share									$ 8,993	$ 15,776	$ 10,572
Basic earnings per share: Income available to common stockholders	4,204	3,066	(249)	1,972	3,811	3,462	5,811	2,692	8,993	15,776	10,572
Diluted earnings per share: Income available to common stockholders									$ 8,993	$ 15,776	$ 10,572
Shares (denominator)
Basic earnings per share: Income available to common stockholders (in shares)									15,798,885	10,571,073	10,092,181
Effect of dilutive securities: Warrants and stock option plans (in shares)									811,069	412,961	538,539
Diluted earnings per share: Income available to common stockholders (in shares)									16,609,954	10,984,034	10,630,720
Per Share Amount
Basic earnings per share: Income available to common stockholders (in dollars per share)	$ 0.26	$ 0.19	$ (0.02)	$ 0.14	$ 0.33	$ 0.34	$ 0.56	$ 0.26	$ 0.57	$ 1.49	$ 1.05
Diluted earnings per share: Income available to common stockholders (in dollars per share)	$ 0.25	$ 0.18	$ (0.02)	$ 0.13	$ 0.32	$ 0.32	$ 0.55	$ 0.25	$ 0.54	$ 1.44	$ 0.99