Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Reconciliation of the component parts of earnings per share [Abstract]
Net income	$ 19,364	$ 17,871	$ 17,089	$ 16,762	$ 14,433	$ 14,083	$ 54,324	$ 45,278
Weighted average common shares (in shares)	19,111			19,249			19,159	19,272
Stock Options (in shares)	1			3			1	6
Weighted average common shares including potential dilutive shares (in shares)	19,112			19,252			19,160	19,278
Basic EPS (in dollars per share)	$ 1.013			$ 0.871			$ 2.835	$ 2.349
Diluted EPS (in dollars per share)	$ 1.013			$ 0.871			$ 2.835	$ 2.349
Stock Options [Member]
Antidilutive Securities [Abstract]
Number of anti-dilutive stock options excluded from diluted earnings per share (in shares)	1			60			1	60