Earnings Per Common Share (EPS) (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Shares used in calculation of diluted EPS
Weighted average common shares outstanding	2,005,096	2,018,753	2,014,055	2,018,614
Dilutive effect of stock options		89
Weighted average common and common equivalent shares outstanding	2,005,096	2,018,842	2,014,055	2,018,614
Dilutive effect
Based on the Company's net income position, dilutive effect of stock options (in shares)			2,250	4,750
Based on the Company's net income position, dilutive effect of stock options, weighted average exercise price (in dollars per share)			$ 8.91	$ 10.58
Stock Options.
Dilutive effect
Based on the Company's net income position, anti-dilutive securities (in shares)	18,168	11,418	15,918	11,418
Based on the Company's net income position, anti-dilutive securities, weighted average exercise price (in dollars per share)	$ 13.81	$ 15.99	$ 14.51	$ 15.99