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 6 Months Ended 12 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Net income:          
Continuing operations $ 40,940 $ 43,271 $ 65,122 $ 74,824  
Income from discontinued operations, net of tax 0 9 0 0  
Net income $ 40,940 $ 43,280 $ 65,122 $ 74,824 $ 178,449
Weighted average number of shares outstanding:          
Basic 52,916 53,541 53,037 54,161  
Dilutive effect of stock-based compensation awards 829 1,187 917 1,339  
Diluted 53,745 54,728 53,954 55,500  
Net income per share - basic:          
Continuing operations (usd per share) $ 0.77 $ 0.81 $ 1.23 $ 1.38  
Discontinued operations (usd per share) $ 0.00 $ 0.00 $ 0.00 $ 0.00  
Net income (usd per share) $ 0.77 $ 0.81 $ 1.23 $ 1.38  
Net income per share - diluted:          
Continuing operations (usd per share) $ 0.76 $ 0.79 $ 1.21 $ 1.35  
Discontinued operations (usd per share) $ 0.00 $ 0.00 $ 0.00 $ 0.00  
Net income (usd per share) $ 0.76 $ 0.79 $ 1.21 $ 1.35  
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 842 350 794 432