Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income (Numerator) [Abstract]
Net income as reported	$ 6,686	$ 6,288	$ 6,395	$ 6,156	$ 6,363	$ 5,933	$ 5,734	$ 5,506	$ 25,525	$ 23,536	$ 19,588
Basic EPS: Income available to common shareholders									25,525	23,536	19,588
Diluted EPS: Income available to common shareholders plus assumed conversions									$ 25,525	$ 23,536	$ 19,588
Shares (Denominator) [Abstract]
Weighted average number of common shares outstanding (in shares)									10,815,718	10,783,419	10,747,306
Effect of dilutive securities: restricted stock (in shares)									73,591	69,055	71,712
Diluted EPS: Income available to common shareholders plus assumed conversions (in shares)									10,889,309	10,852,474	10,819,018
Per-Share Amount [Abstract]
Basic EPS: Income available to common shareholders (in dollars per share)	$ 0.62	$ 0.58	$ 0.59	$ 0.57	$ 0.59	$ 0.55	$ 0.53	$ 0.51	$ 2.36	$ 2.18	$ 1.82
Diluted EPS: Income available to common shareholders plus assumed conversions (in dollars per share)	$ 0.60	$ 0.58	$ 0.59	$ 0.57	$ 0.58	$ 0.55	$ 0.53	$ 0.51	$ 2.34	$ 2.17	$ 1.81