Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 25, 2020
Earnings Per Share [Abstract]
Stock dividend, percent		300.00%	300.00%	300.00%	300.00%	3.00%
Net Income		$ 11,046	$ 10,067	$ 28,332	$ 27,735
Weighted Average Shares - Basic (in shares)	[1]	15,472	15,404	15,453	15,375
Earnings Per Share - Basic (in dollars per share)		$ 0.71	$ 0.65	$ 1.83	$ 1.80
Dilutive Average Shares Attributable to Stock Options (in shares)		9	37	14	42
Weighted Average Shares - Diluted (in shares)	[1]	15,481	15,441	15,467	15,417
Earnings Per Share - Diluted (in dollars per share)		$ 0.71	$ 0.65	$ 1.83	$ 1.80

[1] 2019 Share and Per Share Amounts have been restated for the September 25, 2020 3% stock dividend.