Annual report pursuant to Section 13 and 15(d)

Stock Based Compensation (Details 1)

v2.4.0.8
Stock Based Compensation (Details 1) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Range of Exercise Price - Lower Range Limit $ 11.48 $ 8.06 $ 8.06
Range of Exercise Price - Upper Range Limit $ 42.82 $ 44.44 $ 44.44
Stock Options Outstanding      
Number Outstanding (shares) 258,815    
Stock Options Exercisable      
Number Exercisable (shares) 225,415    
$8.06 - $15.98 [Member]
      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Range of Exercise Price - Lower Range Limit $ 11.48    
Range of Exercise Price - Upper Range Limit $ 14.00    
Stock Options Outstanding      
Number Outstanding (shares) 59,453    
Weighted Average Contractual Life 1 year 8 months 22 days    
Weighted Average Exercise Price (in dollars per share) $ 13.80    
Stock Options Exercisable      
Number Exercisable (shares) 29,953    
Weighted Average Exercise Price (in dollars per share) $ 13.75    
$17.98 - $19.80 [Member]
      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Range of Exercise Price - Lower Range Limit $ 15.98    
Range of Exercise Price - Upper Range Limit $ 19.80    
Stock Options Outstanding      
Number Outstanding (shares) 35,142    
Weighted Average Contractual Life 0 years 11 months 25 days    
Weighted Average Exercise Price (in dollars per share) $ 16.06    
Stock Options Exercisable      
Number Exercisable (shares) 34,542    
Weighted Average Exercise Price (in dollars per share) $ 16.02    
$19.90 - $19.90 [Member]
      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Range of Exercise Price - Lower Range Limit $ 19.90    
Range of Exercise Price - Upper Range Limit $ 19.90    
Stock Options Outstanding      
Number Outstanding (shares) 139,840    
Weighted Average Contractual Life 1 year 4 months 16 days    
Weighted Average Exercise Price (in dollars per share) $ 19.90    
Stock Options Exercisable      
Number Exercisable (shares) 139,840    
Weighted Average Exercise Price (in dollars per share) $ 19.90    
$21.10 - $40.55 [Member]
      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Range of Exercise Price - Lower Range Limit $ 22.11    
Range of Exercise Price - Upper Range Limit $ 22.11    
Stock Options Outstanding      
Number Outstanding (shares) 6,300    
Weighted Average Contractual Life 2 years 7 months 11 days    
Weighted Average Exercise Price (in dollars per share) $ 22.11    
Stock Options Exercisable      
Number Exercisable (shares) 3,000    
Weighted Average Exercise Price (in dollars per share) $ 22.11    
$42.82 - $44.44 [Member]
      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Range of Exercise Price - Lower Range Limit $ 42.82    
Range of Exercise Price - Upper Range Limit $ 42.82    
Stock Options Outstanding      
Number Outstanding (shares) 18,080    
Weighted Average Contractual Life 0 years 0 months 28 days    
Weighted Average Exercise Price (in dollars per share) $ 42.82    
Stock Options Exercisable      
Number Exercisable (shares) 18,080    
Weighted Average Exercise Price (in dollars per share) $ 42.82