Earnings Per Share (Reconciliation Of Common Shares Used In Denominator For Computing Basic And Diluted EPS) (Details) - $ / shares shares in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Weighted average shares of common stock outstanding, used in computing basic earnings per share (in shares)	69,441	70,080
Effect of dilutive stock options and restricted stock units (in shares)	1,014	930
Weighted-average shares of common stock outstanding, used in computing diluted earnings per share (in shares)	70,455	71,010
Income Loss From Continuing Operations Per Basic And Diluted Share [Abstract]
Earnings (loss) per share of common stock, Basic (in dollars per share)	$ 0.46	$ 0.38
Earnings (loss) per share of common stock, Diluted (in dollars per share)	$ 0.45	$ 0.37