Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share (Basic And Diluted Earnings Per Share) (Details)

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Earnings Per Share (Basic And Diluted Earnings Per Share) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Net income      
Continuing operations $ 31,553 $ 27,288  
Loss from discontinued operations, net of tax (9) (1,118)  
Net income $ 31,544 $ 26,170 $ 130,675
Weighted average number of shares outstanding:      
Basic (shares) 54,787 58,310  
Dilutive effect of stock-based compensation awards (shares) 1,491 1,743  
Diluted (shares) 56,278 60,053  
Net income (loss) per share - basic:      
Continuing operations (usd per share) $ 0.58 $ 0.47  
Discontinued operations (usd per share) $ 0.00 $ (0.02)  
Net income (usd per share) $ 0.58 $ 0.45  
Net income (loss) per share - diluted:      
Continuing operations (usd per share) $ 0.56 $ 0.45  
Discontinued operations (usd per share) $ 0.00 $ (0.01)  
Net income (usd per share) $ 0.56 $ 0.44  
Unexercised employee stock options and stock appreciation rights and unvested restricted stock units excluded from the diluted EPS calculation because their effect would have been antidilutive 515 939