Earnings Per Common Share (Details) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Shares
Basic earnings per share (in shares)	8,611,507	8,680,502	7,867,198
Effect of dilutive securities - stock options (in shares)	9,734	7,948	10,378
Diluted earnings per share (in shares)	8,621,241	8,688,450	7,877,576
Per Share Amount
Basic earnings per share (in dollars per share)	$ 1.89	$ 1.73	$ 1.62
Effect of dilutive securities - stock options (in dollars per share)	0.00	0.00	0.00
Diluted earnings per share (in dollars per share)	$ 1.89	$ 1.73	$ 1.62
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options on common stock not included in computing diluted earnings per share (in shares)	11,397	66,238	117,843