Earnings per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Basic earnings per share computation [Abstract]
Net income applicable to common stock	$ 3,120	$ 3,176
Weighted average common shares outstanding (in shares)	3,026,265	3,041,923
Earnings per share - basic (in dollars per share)	$ 1.03	$ 1.04
Diluted earnings per share computation [Abstract]
Weighted average common shares outstanding for basic earnings per share (in shares)	3,026,265	3,041,923
Add: Dilutive effects of restricted stock (in shares)	0	194
Weighted average common shares outstanding for dilutive earnings per share (in shares)	3,026,265	3,042,117
Earnings per share - dilutive (in dollars per share)	$ 1.03	$ 1.04
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive restricted stock excluded from net income per share calculations (in shares)	4,082	2,581
Restricted Stock [Member] | Minimum [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive stock share price range (in dollars per share)	$ 37.10	$ 37.35
Restricted Stock [Member] | Maximum [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive stock share price range (in dollars per share)	$ 53.50	$ 50.15