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, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Earnings Per Share [Abstract]        
Weighted average shares of common stock outstanding, used in computing basic earnings per share (in shares) 70,093 68,904 69,811 68,650
Effect of dilutive stock options and restricted stock units (in shares) 725 602 882 630
Weighted-average shares of common stock outstanding, used in computing diluted earnings per share (in shares) 70,818 69,506 70,693 69,280
Earnings per share of common stock:        
Earnings (loss) per share of common stock, Basic (in dollars per share) $ 0.94 $ 0.79 $ 1.17 $ 0.84
Earnings (loss) per share of common stock, Diluted (in dollars per share) $ 0.93 $ 0.79 $ 1.15 $ 0.83