XML 21 R55.htm IDEA: XBRL DOCUMENT v2.4.0.8
STOCK-BASED COMPENSATION Restricted Stock Units (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Restricted Stock Units Activity      
Unvested Units 690,107    
Granted 456,921    
Vested (513,750)    
Reinvested 30,936    
Unvested Units 664,214 690,107  
Weighted Average Grant Date Fair Value Per Unit      
Fair value of units vested $ 10.7 $ 2.1 $ 1.3
Restricted Stock Units (RSUs)
     
Weighted Average Grant Date Fair Value Per Unit      
Unvested $ 17.54    
Granted (dollars per share) $ 18.52 $ 18.34 $ 16.74
Vested (dollars per share) $ 20.83    
Reinvested (dollar per share) $ 16.80    
Unvested $ 16.48 $ 17.54  
Weighted Average Remaining Contractual Term 2 years 2 months    
Funds From Operations Units | Minimum
     
Share-based Compensation Arrangement by Share-based Payment Award      
Award vesting percentage 0.00%    
Funds From Operations Units | Maximum
     
Share-based Compensation Arrangement by Share-based Payment Award      
Award vesting percentage 250.00%    
TSR Units
     
Share-based Compensation Arrangement by Share-based Payment Award      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate     1.18%
TSR Units | Minimum
     
Share-based Compensation Arrangement by Share-based Payment Award      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 0.37% 0.38%  
Award vesting percentage 0.00%    
TSR Units | Maximum
     
Share-based Compensation Arrangement by Share-based Payment Award      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 0.67% 0.40%  
Award vesting percentage 150.00%    
Performance Incentive Plan of 2009 | Restricted Stock Units (RSUs) | Minimum
     
Share-based Compensation Arrangement by Share-based Payment Award      
Award vesting period 3 years    
Performance Incentive Plan of 2009 | Restricted Stock Units (RSUs) | Maximum
     
Share-based Compensation Arrangement by Share-based Payment Award      
Award vesting period 5 years