(Loss) Income Per Common Share (Computation Of Basic And Diluted Income Per Common Share) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
(Loss) Income Per Common Share [Abstract]
Net (loss) income		$ (3,855)	$ 2,223
Net loss (income) allocated to participating securities		38	(44)
Net (loss) income allocated to common shareholders		$ (3,817)	$ 2,179
Basic weighted-average common shares outstanding		36,146,000	32,439,000
Basic (loss) income per common share		$ (0.11)	$ 0.07
Net loss (income) allocated to participating securities, diluted		$ 38	$ (43)
Net (loss) income allocated to common shareholders, diluted		$ (3,817)	$ 2,180
Effect of dilutive stock options and awards	[1]		1,165,000
Diluted weighted-average common shares outstanding		36,146,000	33,604,000
Diluted (loss) income per common share		$ (0.11)	$ 0.06
Antidilutive securities excluded from computation of earnings per share			116,000

[1] We excluded stock options from the calculation of diluted weighted-average common shares outstanding if the per share value, including the sum of (i) the exercise price of the options and (ii) the amount of the compensation cost attributed to future services and not yet recognized, was greater than the average market price of the shares because the inclusion of these stock options would be antidilutive to (loss) income per common share. Accordingly, as of March 31, 2018 all stock options and awards were excluded from the calculation of diluted weighted-average common shares outstanding as these would be anti-dilutive due to the net loss. For the three months ended March 31, 2017 stock options to purchase a weighted-average 116,000 shares were antidilutive and excluded from the calculation of diluted weighted-average common shares outstanding.