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Stock-Based Compensation (Details 2) (Stock options, USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Options Outstanding  
Number Outstanding (in shares) 1,029
Weighted Average Remaining Contractual Life 6 years 2 months 1 day
Weighted Average Exercise Price (in dollars per share) $ 41.66
Options Exercisable  
Number Exercisable (in shares) 249
Weighted Average Exercise Price (in dollars per share) $ 32.35
$26.34-$33.65
  
Information about options outstanding  
Low end of exercise price range (in dollars per share) $ 26.34
High end of exercise price range (in dollars per share) $ 33.65
Options Outstanding  
Number Outstanding (in shares) 305
Weighted Average Remaining Contractual Life 3 years 11 months 19 days
Weighted Average Exercise Price (in dollars per share) $ 30.18
Options Exercisable  
Number Exercisable (in shares) 174
Weighted Average Exercise Price (in dollars per share) $ 30.16
$35.20-$35.70
  
Information about options outstanding  
Low end of exercise price range (in dollars per share) $ 35.20
High end of exercise price range (in dollars per share) $ 35.70
Options Outstanding  
Number Outstanding (in shares) 10
Weighted Average Remaining Contractual Life 3 years 9 months 18 days
Weighted Average Exercise Price (in dollars per share) $ 35.35
Options Exercisable  
Number Exercisable (in shares) 10
Weighted Average Exercise Price (in dollars per share) $ 35.35
$37.41-$37.41
  
Information about options outstanding  
Low end of exercise price range (in dollars per share) $ 37.41
High end of exercise price range (in dollars per share) $ 37.41
Options Outstanding  
Number Outstanding (in shares) 301
Weighted Average Remaining Contractual Life 6 years 18 days
Weighted Average Exercise Price (in dollars per share) $ 37.41
Options Exercisable  
Number Exercisable (in shares) 55
Weighted Average Exercise Price (in dollars per share) $ 37.41
$40.17-$57.95
  
Information about options outstanding  
Low end of exercise price range (in dollars per share) $ 40.17
High end of exercise price range (in dollars per share) $ 57.95
Options Outstanding  
Number Outstanding (in shares) 413
Weighted Average Remaining Contractual Life 7 years 11 months 5 days
Weighted Average Exercise Price (in dollars per share) $ 53.40
Options Exercisable  
Number Exercisable (in shares) 10
Weighted Average Exercise Price (in dollars per share) $ 40.17