(Loss) Earnings Per Common Share (Computation Of Basic And Diluted (Loss) Income Per Common Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Basic (loss) income per common share
Net (loss) income	$ (13,713)	$ 10,582	$ (21,361)	$ 5,266
Net loss (income) allocated to participating securities	70	(63)	109	(34)
Net (loss) income allocated to common shareholders	$ (13,643)	$ 10,519	$ (21,252)	$ 5,232
Basic weighted-average common shares outstanding (in shares)	40,115,000	39,086,000	39,999,000	38,924,000
Basic (loss) income per common share (in usd per share)	$ (0.34)	$ 0.27	$ (0.53)	$ 0.13
Diluted (loss) income per common share
Net (loss) income	$ (13,713)	$ 10,582	$ (21,361)	$ 5,266
Net loss (income) allocated to participating securities	70	(55)	109	(34)
Net loss attributable to convertible senior notes	0	919	0	0
Net (loss) income allocated to common shareholders	$ (13,643)	$ 11,446	$ (21,252)	$ 5,232
Effect of dilutive stock options and awards (in shares)	0	505,000	0	572,000
Effect of convertible senior notes (in shares)	0	4,862,000	0	0
Diluted weighted-average common shares outstanding (in shares)	40,115,000	44,453,000	39,999,000	39,496,000
Diluted (loss) income per common share (in usd per share)	$ (0.34)	$ 0.26	$ (0.53)	$ 0.13
Effect of dilutive stock options and awards
Diluted (loss) income per common share
Antidilutive shares (in shares)		539,000		517,000
Effect of convertible senior notes
Diluted (loss) income per common share
Antidilutive shares (in shares)				4,860,685