Earnings Per Share (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Shares [Abstract]
Basic earnings per share (in shares)	7,867,222	7,832,162	7,862,719	7,827,195
Effect of dilutive securities - stock options (in shares)	9,747	16,980	9,632	12,169
Diluted earnings per share (in shares)	7,876,969	7,849,142	7,872,351	7,839,364
Per Share Amount [Abstract]
Basic earnings per share (in dollars per share)	$ 0.54	$ 0.55	$ 1.06	$ 1.08
Effect of dilutive securities - stock options (in dollars per share)	$ (0.01)	$ (0.01)	$ 0	$ 0
Diluted earnings per share (in dollars per share)	$ 0.53	$ 0.54	$ 1.06	$ 1.08
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities not included in computation of earning per share (in shares)			182,620	196,394