Earnings Per Common Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Numerator:
Net income	$ 21,030	$ 17,435	$ 16,187
Preferred dividend			(2,196)
Warrant amortization			(1,545)
Net income available to common shareholders	21,030	17,435	12,446
Earnings allocated to participating securities	(253)	(139)
Numerator for basic earnings per common share	20,777	17,296	12,446
Effect of reallocating undistributed earnings of participating securities	253	139
Numerator for diluted earnings per common share	$ 21,030	$ 17,435	$ 12,446
Denominator:
Weighted average common shares outstanding	19,416,582	19,516,776	19,374,098
Effect of dilutive securities:
Stock compensation	142,877	87,469
Denominator for diluted earnings per common share	19,559,459	19,604,245	19,374,098
Earnings per common share:
Basic	$ 1.07	$ 0.89	$ 0.64
Diluted	$ 1.07	$ 0.89	$ 0.64