Earnings Per Share (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Basic Net Income per Common Share Available to Common Stockholders [Abstract]
Net income	$ 3,607,000	$ 3,528,000
Preferred stock dividends	(1,104,000)	(1,104,000)
Net income available to common stockholders	2,503,000	2,424,000
Weighted average common shares outstanding	5,883,340	5,955,284
Basic earnings per common share	$ 0.43	$ 0.41
Diluted Net Income per Common Share Available to Common Stockholders [Abstract]
Net income available to common stockholders	2,503,000	2,424,000
Effect of assumed preferred stock conversion	0	0
Net income applicable to diluted earnings per share	$ 2,503,000	$ 2,424,000
Weighted average common shares outstanding	5,883,340	5,955,284
Dilutive potential common shares [Abstract]
Assumed conversion of stock options	0	1,284
Restricted stock awarded	8,017	10,015
Assumed conversion of preferred stock	0	0
Dilutive potential common shares	8,017	11,299
Diluted weighted average common shares outstanding	5,891,357	5,966,583
Diluted net income per common share available to common stockholders	$ 0.43	$ 0.41
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)	128,750	108,125
Average dilutive potential common shares associated with convertible preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share (in shares)	2,494,790	2,494,801