Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share (Reconciliation Of Common Shares Used In Denominator For Computing Basic And Diluted EPS) (Details)

v3.10.0.1
Earnings Per Share (Reconciliation Of Common Shares Used In Denominator For Computing Basic And Diluted EPS) (Details) - $ / shares
shares in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Earnings Per Share [Abstract]        
Weighted average shares of common stock outstanding, used in computing basic earnings per share (in shares) 69,589 69,815 69,895 69,698
Effect of dilutive stock options and restricted stock units (in shares) 768 574 790 692
Weighted-average shares of common stock outstanding, used in computing diluted earnings per share (in shares) 70,357 70,389 70,685 70,390
Income Loss From Continuing Operations Per Basic And Diluted Share [Abstract]        
Earnings (loss) per share of common stock, Basic (in dollars per share) $ 1.44 $ 1.26 $ 2.22 $ 1.61
Earnings (loss) per share of common stock, Diluted (in dollars per share) $ 1.42 $ 1.25 $ 2.19 $ 1.59