Earnings Per Share (Details) (USD $)	3 Months Ended				6 Months Ended		9 Months Ended
	Sep. 30, 2014	Mar. 31, 2014	Sep. 30, 2013	Mar. 31, 2013	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Shares [Abstract]
Basic earnings per share (in shares)	7,841,078		7,877,901				7,871,016	7,867,835
Effect of dilutive securities - stock options (in shares)	10,657		14,114				10,425	11,126
Diluted earnings per share (in shares)	7,851,735		7,892,015	7,892,015			7,881,441	7,878,961
Per Share Amount [Abstract]
Basic earnings per share (in dollars per share)	$ 0.40	$ 0.40	$ 0.54		$ 1.25	$ 1.60	$ 1.25	$ 1.60
Effect of dilutive securities - stock options (in dollars per share)	$ 0		$ 0				$ 0	$ 0
Diluted earnings per share (in dollars per share)	$ 0.40	$ 0.40	$ 0.54	$ 0.54			$ 1.25	$ 1.60
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)							120,277	182,620