Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation and Employee Benefit Plans (Details 2)

v2.4.0.6
Share-Based Compensation and Employee Benefit Plans (Details 2) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Stock Options        
Exercised (in shares) (61,624) (191,264) (278,656)  
Aggregate Intrinsic Value        
Increase (Decrease) in tax benefit from share-based compensation $ 43 $ 47    
Options
        
Stock Options        
Outstanding at the beginning of the period (in shares) 945,422 1,188,284 1,501,906  
Forfeited/Expired (in shares) (85,588) (51,598) (34,966)  
Exercised (in shares) (61,624) (191,264) (278,656)  
Outstanding at the end of the period (in shares) 798,210 945,422 1,188,284 1,501,906
Exercisable at the end of the period (in shares) 798,210 [1] 945,422 [2] 1,188,284 [3]  
Exercise price range, options outstanding, low end of range (in dollars per share) $ 13.60 $ 13.4 $ 9.54 $ 8.63
Exercise price range, options outstanding, high end of range (in dollars per share) $ 57 $ 57 $ 57 $ 57
Weighted Average Exercise Price per Share        
Outstanding at the beginning of the period (in dollars per share) $ 36.63 $ 33.07 $ 30.29  
Forfeited/Expired (in dollars per share) $ 42.98 $ 42.82 $ 46.59  
Exercised (in dollars per share) $ 15.08 $ 12.82 $ 16.42  
Outstanding at the end of the period (in dollars per share) $ 37.62 $ 36.63 $ 33.07 $ 30.29
Exercisable at the end of the period (in dollars per share) $ 37.62 $ 36.63 $ 33.07  
Weighted Average Remaining Contractual Term        
Weighted average remaining contractual term 3 years 4 years 5 years 5 years
Aggregate Intrinsic Value        
Balance outstanding 325 510 7,987 14,579
Aggregate intrinsic value of options exercised $ 553 $ 4,000 $ 5,900  
Options | Range of Exercise Price One | Vested
        
Stock Options        
Exercisable at the end of the period (in shares) 9,500 53,957 231,946  
Exercise price range, options outstanding, low end of range (in dollars per share) $ 13.60 $ 13.40 $ 9.54  
Exercise price range, options outstanding, high end of range (in dollars per share) $ 16.73 $ 16.73 $ 16.73  
Options | Range of Exercise Price Two | Vested
        
Stock Options        
Exercisable at the end of the period (in shares) 204,736 225,903 246,103  
Exercise price range, options outstanding, low end of range (in dollars per share) $ 16.74 $ 16.74 $ 16.74  
Exercise price range, options outstanding, high end of range (in dollars per share) $ 30.04 $ 30.04 $ 30.04  
Options | Range of Exercise Price Three | Vested
        
Stock Options        
Exercisable at the end of the period (in shares) 80,962 198,762 205,012  
Exercise price range, options outstanding, low end of range (in dollars per share) $ 30.05 $ 30.05 $ 30.05  
Exercise price range, options outstanding, high end of range (in dollars per share) $ 41.28 $ 41.28 $ 41.28  
Options | Range of Exercise Price Four | Vested
        
Stock Options        
Exercisable at the end of the period (in shares) 403,012 466,800 253,607  
Exercise price range, options outstanding, low end of range (in dollars per share) $ 41.29 $ 41.29 $ 41.29  
Exercise price range, options outstanding, high end of range (in dollars per share) $ 57 $ 57 $ 45.24  
Options | Range of Exercise Price Five | Vested
        
Stock Options        
Exercisable at the end of the period (in shares)     251,616  
Exercise price range, options outstanding, low end of range (in dollars per share)     $ 45.25  
Exercise price range, options outstanding, high end of range (in dollars per share)     $ 57  
Minimum | Options
        
Stock Options        
Exercise price range, options forfeited (in dollars per share) $ 25.52 $ 22.49 $ 41.33  
Exercise price range, options exercised (in dollars per share) $ 13.4 $ 9.54 $ 8.63  
Maximum | Options
        
Stock Options        
Exercise price range, options forfeited (in dollars per share) $ 57 $ 50.59 $ 49.6  
Exercise price range, options exercised (in dollars per share) $ 22.49 $ 30.25 $ 42.07  
[1] of these options had an exercise price ranging from $13.60 to $16.73; 204,736 had an exercise price ranging from $16.74 to $30.04; 180,962 had an exercise price ranging from $30.05 to $41.28; and 403,012 had an exercise price ranging from $41.29 to $57.00.
[2] 53,957 of these options had an exercise price ranging from $13.40 to $16.73; 225,903 had an exercise price ranging from $16.74 to $30.04; 198,762 had an exercise price ranging from $30.05 to $41.28; and 466,800 had an exercise price ranging from $41.29 to $57.00.
[3] 231,946 of these options had an exercise price ranging from $9.54 to $16.73; 246,103 had an exercise price ranging from $16.74 to $30.04; 205,012 had an exercise price ranging from $30.05 to $41.28; 253,607 had an exercise price ranging from $41.29 to $45.24; and 251,616 had an exercise price ranging from $45.25 to $57.00.