Earnings per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Basic earnings per share computation [Abstract]
Net income applicable to common stock	$ 3,287	$ 3,449
Weighted average common shares outstanding (in shares)	2,889,523	2,924,268
Earnings per share - basic (in dollars per share)	$ 1.14	$ 1.18
Diluted earnings per share computation [Abstract]
Weighted average common shares outstanding for basic earnings per share (in shares)	2,889,523	2,924,268
Add: Dilutive effects of restricted stock	449	165
Weighted average common shares outstanding for dilutive earnings per share (in shares)	2,889,972	2,924,433
Earnings per share - dilutive (in dollars per share)	$ 1.14	$ 1.18
Antidilutive restricted stock excluded from net income per share calculations (in shares)	147	3,073