Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Sep. 27, 2019
Earnings Per Share [Abstract]
Stock dividend, percent						3.00%
Net Income		$ 9,159	$ 8,934	$ 17,286	$ 17,668
Weighted Average Shares - Basic (in shares)	[1]	14,992	14,922	14,994	14,912
Earnings Per Share - Basic (in dollars per share)		$ 0.61	$ 0.60	$ 1.15	$ 1.19
Dilutive Average Shares Attributable to Stock Options (in shares)		6	41	16	46
Weighted Average Shares - Diluted (in shares)	[1]	14,998	14,963	15,010	14,958
Earnings Per Share - Diluted (in dollars per share)		$ 0.61	$ 0.60	$ 1.15	$ 1.18

[1] Cash dividends paid per share have been adjusted for the September 27, 2019 3% stock dividend.