Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation (Summary Of Stock Option Activity) (Details)

v2.4.0.6
Stock-Based Compensation (Summary Of Stock Option Activity) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
years
Dec. 31, 2010
years
Dec. 31, 2009
years
Stock-Based Compensation [Abstract]      
Options outstanding, Beginning, Number of Shares 1,872,214 1,760,173 1,653,639
Granted, Number of Shares 340,973 385,924 387,505
Cancelled, Number of Shares (40,396) (77,481) (252,303)
Exercised, Number of Shares (253,695) (196,402) (28,668)
Options outstanding, Ending, Number of Shares 1,919,096 1,872,214 1,760,173
Options outstanding, Beginning, Weighted Average Exercise Price $ 42.84 $ 42.08 $ 45.10
Granted, Weighted Average Exercise Price $ 61.38 $ 44.11 $ 29.75
Cancelled, Weighted Average Exercise Price $ 43.68 $ 46.04 $ 44.90
Exercised, Weighted Average Exercise Price $ 43.32 $ 37.34 $ 24.76
Options outstanding, Ending, Weighted Average Exercise Price $ 46.05 $ 42.84 $ 42.08
Options outstanding, Beginning, Weighted Average Remaining Contractual Life, years 6.33 6.25 6.73
Options outstanding, Ending, Weighted Average Remaining Contractual Life, years 6.25 6.33 6.25
Options outstanding, Beginning, Aggregate Intrinsic Value $ 33,057 $ 4,599 $ 1,042
Options outstanding, Ending, Aggregate Intrinsic Value 9,141 33,057 4,599
Options vested and expected to vest at December 31, 2011, Number of Shares 1,857,797    
Options vested and expected to vest at December 31, 2011, Weighted Average Exercise Price $ 45.81    
Options vested and expected to vest at December 31, 2011, Weighted Average Remaining Contractual Life, years 6.17    
Options vested and expected to vest at December 31, 2011, Aggregate Intrinsic Value 8,994    
Options exercisable at December 31, 2011, Number of Shares 1,145,763    
Options exercisable at December 31, 2011, Weighted Average Exercise Price $ 44.24    
Options exercisable at December 31, 2011, Weighted Average Remaining Contractual Life, years 4.83    
Options exercisable at December 31, 2011 , Aggregate Intrinsic Value $ 5,716