Earnings Per Share (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Shares [Abstract]
Basic earnings per share (in shares)	7,877,901	7,838,314	7,867,835	7,830,928
Effect of dilutive securities - stock options (in shares)	14,114	17,223	11,126	15,731
Diluted earnings per share (in shares)	7,892,015	7,855,537	7,878,961	7,846,659
Per Share Amount [Abstract]
Basic earnings per share (in dollars per share)	$ 0.54	$ 0.46	$ 1.60	$ 1.54
Effect of dilutive securities - stock options (in dollars per share)	$ 0	$ 0	$ 0	$ 0
Diluted earnings per share (in dollars per share)	$ 0.54	$ 0.46	$ 1.60	$ 1.54
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)			168,760	163,559