Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2019		Mar. 31, 2018		Sep. 27, 2018
Earnings Per Share [Abstract]
Stock dividend, percent						3.00%
Net Income		$ 8,734		$ 8,531
Weighted Average Shares - Basic (in shares)		14,469	[1]	14,354	[2]
Earnings Per Share - Basic (in dollars per share)		$ 0.60	[1]	$ 0.59	[2]
Dilutive Average Shares Attributable to Stock Options (in shares)		51		82
Weighted Average Shares - Diluted (in shares)	[2]	14,520		14,436
Earnings Per Share- Diluted (in dollars per share)		$ 0.60	[1]	$ 0.59	[2]

[1] Cash dividends paid per share have been adjusted for the September 27, 2018 3% stock dividend.

[2] 2018 Share and Per Share Amounts have been restated for the September 27, 2018 3% stock dividend.