Earnings Per Share (Reconciliation Of Common Shares Used In Denominator For Computing Basic And Diluted EPS) (Details) - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	937,523	325,226
Weighted average shares of common stock outstanding, used in computing basic earnings per share (in shares)	66,970,000	68,290,000
Effect of dilutive stock options and restricted stock units (in shares)	442,000	762,000
Weighted-average shares of common stock outstanding, used in computing diluted earnings per share (in shares)	67,412,000	69,052,000
Income Loss From Continuing Operations Per Basic And Diluted Share [Abstract]
Earnings (loss) per share of common stock, Basic (in dollars per share)	$ 0	$ 1.09
Earnings (loss) per share of common stock, Diluted (in dollars per share)	$ 0	$ 1.07