(Loss) Earnings Per Share (Computation Of Basic And Diluted (Loss) Income 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
Basic (loss) income per common share
Net (loss) income	$ (3,689)	$ 2,832	$ (10,354)	$ 2,535
Net income (loss) allocated to participating securities	24	(19)	73	(18)
Net (loss) income allocated to common shareholders	$ (3,665)	$ 2,813	$ (10,281)	$ 2,517
Basic weighted-average common shares outstanding	37,520	37,156	37,455	36,968
Basic (loss) income per common share	$ (0.10)	$ 0.08	$ (0.27)	$ 0.07
Diluted (loss) income per common share
Net (loss) income	$ (3,689)	$ 2,832	$ (10,354)	$ 2,535
Net income (loss) allocated to participating securities	24	(18)	73	(18)
Net (loss) income allocated to common shareholders	$ (3,665)	$ 2,814	$ (10,281)	$ 2,517
Basic weighted-average common shares outstanding	37,520	37,156	37,455	36,968
Effect of dilutive stock options and awards		682		821
Diluted weighted-average common shares outstanding	37,520	37,838	37,455	37,789
Diluted (loss) income per common share	$ (0.10)	$ 0.07	$ (0.27)	$ 0.07