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)

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Earnings Per Share (Reconciliation Of Common Shares Used In Denominator For Computing Basic And Diluted EPS) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Earnings Per Share [Abstract]        
Weighted average shares of common stock outstanding, used in computing basic earnings per share (in shares) 34,452 33,872 34,325 33,761
Effect of dilutive stock options and restricted stock units 301 283 315 274
Weighted-average shares of common stock outstanding, used in computing diluted earnings per share (in shares) 34,753 34,155 34,640 34,035
Earnings per share of common stock:        
Earnings per share of common stock, Basic (in dollars per share) $ 1.58 $ 1.90 $ 1.68 $ 1.79
Earnings per share of common stock, Diluted (in dollars per share) $ 1.57 $ 1.88 $ 1.66 $ 1.77