Earnings Per Share (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Shares [Abstract]
Basic earnings per share	3,773,836	3,765,359	3,771,945	3,765,368
Effect of dilutive stock awards	6,711	8,454	7,443	8,320
Diluted earnings per share	3,780,547	3,773,813	3,779,388	3,773,688
Per Share Amount [Abstract]
Earnings per share, basic	$ 0.35	$ 0.34	$ 1.21	$ 0.81
Earnings per share, diluted	$ 0.35	$ 0.34	$ 1.21	$ 0.81