XML 38 R75.htm IDEA: XBRL DOCUMENT v3.3.0.814
Incentive Plan (Performance Based Awards) (Narrative) (Details)
simulation in Thousands, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
USD ($)
Sep. 30, 2014
USD ($)
Sep. 30, 2015
USD ($)
simulation
shares
Sep. 30, 2014
USD ($)
Dec. 31, 2014
USD ($)
2014 Performance Grant          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Performance period     3 years    
Award vesting percentage     0.00%    
Award vesting period     3 years    
Number of trials | simulation     100    
Expected volatility rate     33.00%    
Risk-free interest rate     0.67%    
Fair value of awards     $ 34.3    
Requisite service period of share-based award     4 years    
Unearned compensation $ 18.9   $ 18.9   $ 9.5
Recognized compensation expense 2.1 $ 0.8 5.4 $ 2.2  
Capitalized expense related to construction and leasing activities $ 2.5 $ 0.4 $ 3.6 $ 1.0  
2014 Performance Grant | Class D Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of awards to executive officers and other employees (shares/units) | shares     1,148,991    
2014 Performance Grant | Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of awards to executive officers and other employees (shares/units) | shares     368,878    
2014 Performance Grant | Share-based Compensation Award, Tranche Four          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting percentage     50.00%    
2014 Performance Grant | Share-based Compensation Award, Tranche Fifth          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting percentage     50.00%    
2015 Performance Grant          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Expected volatility rate     24.00%    
Risk-free interest rate     1.00%