Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Sep. 27, 2019
Earnings Per Share [Abstract]
Stock dividend, percent	3.00%	3.00%	3.00%	300.00%
Net Income	$ 37,475	$ 36,279	$ 29,326
Weighted Average Shares - Basic (in shares)	14,940	14,840	14,739
Earnings Per Share - Basic (in dollars per share)	$ 2.51	$ 2.44	$ 1.99
Dilutive Average Shares Attributable to Stock Options (in shares)	43	82	99
Weighted Average Shares - Diluted (in shares)	14,983	14,922	14,838
Earnings Per Share - Diluted (in dollars per share)	$ 2.50	$ 2.43	$ 1.98