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Equity Incentive Programs (Stock Options Narrative) (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Estimated future compensation expense $ 20,500,000   $ 20,500,000  
Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period     4 years  
Options granted (in shares) 0 0 0 0
Compensation expense $ 0 $ 0 $ 0 $ 100,000
Estimated future compensation expense $ 0   $ 0  
Termination for Death [Member] | Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Earliest expiration period of award after event     24 months  
Employment Terminated, Any Other Reason [Member] | Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Earliest expiration period of award after event     90 days  
Termination for Retirement or Disability [Member] | Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Earliest expiration period of award after event     36 months  
Annual Anniversary Grant Date of Award [Member] | Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Earliest expiration period of award after event     10 years  
Vested in the first year [Member] | Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of options vested     0.00%  
Vested in the second year [Member] | Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of options vested     33.33%  
Vested in third year [Member] | Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of options vested     33.33%  
Vested in fourth year [Member] | Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of options vested     33.33%