XML 132 R108.htm IDEA: XBRL DOCUMENT v3.20.4
Incentive Plan - Schedule of Compensation Expense (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Granted (shares) 128,049 120,368 128,986
Long-term incentive units      
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Deferred compensation, expensed $ 12.8 $ 8.7 $ 6.8
Deferred compensation, capitalized 0.2 0.2 0.2
Unearned Compensation $ 15.1 $ 15.4  
Expected period to recognize unearned compensation (in years) 2 years 1 month 6 days 2 years 1 month 6 days  
Granted (shares) 128,049    
Vesting of restricted common units, net (units) 98,038    
Long-term incentive units | Minimum      
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Award vesting period 2 years    
Long-term incentive units | Maximum      
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Award vesting period 4 years    
Market performance-based awards      
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Deferred compensation, expensed $ 24.8 $ 13.0 12.7
Deferred compensation, capitalized 0.6 0.8 0.8
Unearned Compensation $ 34.4 $ 28.4  
Expected period to recognize unearned compensation (in years) 2 years 4 months 24 days 2 years 4 months 24 days  
Market performance-based awards | Minimum      
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Award vesting period 2 years    
Market performance-based awards | Maximum      
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Award vesting period 3 years    
Restricted stock      
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Deferred compensation, expensed $ 15.1 $ 11.5 6.1
Deferred compensation, capitalized 3.2 2.8 $ 4.2
Unearned Compensation $ 41.5 $ 29.1  
Expected period to recognize unearned compensation (in years) 2 years 3 months 18 days 2 years 3 months 18 days  
Vesting of restricted common units, net (units) 385,905    
Award vesting period 4 years    
Interxion awards      
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Deferred compensation, expensed $ 19.7    
Unearned Compensation $ 27.2    
Expected period to recognize unearned compensation (in years) 2 years 2 months 12 days 2 years 2 months 12 days  
Granted (shares) 567,810    
Performance-based Class D Units      
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Granted (shares) 58,561    
Performance-based restricted stock units      
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Granted (shares) 6,148    
Time-based profits interest units      
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Granted (shares) 22,426    
Time-based restricted stock units      
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Granted (shares) 3,209