Earnings Per Share (Computation of Earnings per 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
Earnings Per Share [Abstract]
Basic EPS, Net Income (Numerator)	$ 4,516	$ 4,613	$ 10,091	$ 11,660
Diluted EPS, Net Income (Numerator)	$ 4,516	$ 4,613	$ 10,091	$ 11,660
Basic EPS , Weighted Average Shares (Denominator)	22,312	22,303	22,339	22,224
Effect of dilutive stock awards, Weighted Average Shares (Denominator)	191	258	195	251
Diluted EPS, Weighted Average Shares (Denominator)	22,503	22,561	22,534	22,475
Basic EPS, Per Share Amount	$ 0.20	$ 0.21	$ 0.45	$ 0.52
Effect Of Dilutive Stock Awards, Per Share		(0.01)
Diluted EPS, Per Share Amount	$ 0.20	$ 0.20	$ 0.45	$ 0.52