Earnings Per Share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Basic Net Income per Common Share Available to Common Stockholders [Abstract]
Net income	$ 4,156,000	$ 4,029,000	$ 8,195,000	$ 7,636,000
Preferred stock dividends	(550,000)	(1,104,000)	(1,100,000)	(2,208,000)
Net income available to common stockholders	$ 3,606,000	$ 2,925,000	$ 7,095,000	$ 5,428,000
Weighted average common shares outstanding	7,198,980	5,880,919	7,112,309	5,882,123
Basic earnings per common share	$ 0.50	$ 0.49	$ 1.00	$ 0.92
Diluted Net Income per Common Share Available to Common Stockholders [Abstract]
Net income available to common stockholders	$ 3,606,000	$ 2,925,000	$ 7,095,000	$ 5,428,000
Effect of assumed preferred stock conversion	550,000	1,104,000	1,100,000	2,208,000
Net income applicable to diluted earnings per share	$ 4,156,000	$ 4,029,000	$ 8,195,000	$ 7,636,000
Weighted average common shares outstanding	7,198,980	5,880,919	7,112,309	5,882,123
Dilutive potential common shares [Abstract]
Restricted stock awarded	9,445	9,501	9,445	9,051
Assumed conversion of preferred stock	1,355,348	2,494,569	1,355,348	2,494,679
Dilutive potential common shares	1,364,793	2,504,070	1,364,793	2,503,730
Diluted weighted average common shares outstanding	8,563,773	8,384,989	8,477,102	8,385,853
Diluted net income per common share available to common stockholders	$ 0.49	$ 0.48	$ 0.97	$ 0.91
Stock options to purchase shares of common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share (in shares)	45,500	128,750	45,500	128,750