Quarterly report pursuant to Section 13 or 15(d)

Unsecured Line of Credit Payable - Narrative (Details)

v3.21.2
Unsecured Line of Credit Payable - Narrative (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
Mar. 31, 2018
USD ($)
extension_option
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Mar. 29, 2018
USD ($)
Dec. 31, 2017
USD ($)
Jul. 22, 2016
USD ($)
Line of Credit Facility [Line Items]                
Repayment of borrowings       $ 0 $ 250,000,000      
Credit Agreement                
Line of Credit Facility [Line Items]                
Credit agreement, aggregate maximum borrowing capacity including accordion feature     $ 1,500,000,000          
2016 Term Loan                
Line of Credit Facility [Line Items]                
Debt instrument face amount               $ 150,000,000.0
2016 Term Loan | Interest rate swaps                
Line of Credit Facility [Line Items]                
Derivative fixed interest rate (percent)               2.86%
2018 Term Loan                
Line of Credit Facility [Line Items]                
Debt instrument face amount           $ 250,000,000.0    
2018 Term Loan | Interest rate swaps                
Line of Credit Facility [Line Items]                
Derivative fixed interest rate (percent)           2.87%    
2018 Term Loan A | Interest rate swaps                
Line of Credit Facility [Line Items]                
Derivative notional amount $ 150,000,000.0     $ 150,000,000.0   $ 150,000,000.0    
Derivative fixed interest rate (percent) 2.31%     2.31%   2.31%    
2018 Term Loan B                
Line of Credit Facility [Line Items]                
Debt instrument face amount           $ 100,000,000.0    
2018 Term Loan B | Interest rate swaps                
Line of Credit Facility [Line Items]                
Derivative notional amount $ 100,000,000.0     $ 100,000,000.0   $ 100,000,000.0    
Derivative fixed interest rate (percent) 3.71%     3.71%   3.71%    
Term loan | 2015 Term Loan                
Line of Credit Facility [Line Items]                
Debt instrument face amount     150,000,000.0          
Repayment of borrowings   $ 150,000,000.0            
Term loan | 2016 Term Loan                
Line of Credit Facility [Line Items]                
Debt instrument face amount             $ 150,000,000.0  
Term loan | 2018 Term Loan                
Line of Credit Facility [Line Items]                
Debt instrument face amount     250,000,000.0          
All-in fixed interest rate (percent) 2.87%     2.87%        
Term loan | 2018 Term Loan | LIBOR | Minimum                
Line of Credit Facility [Line Items]                
Basis spread on variable rate (percent)       0.85%        
Term loan | 2018 Term Loan | LIBOR | Maximum                
Line of Credit Facility [Line Items]                
Basis spread on variable rate (percent)       1.75%        
Term loan | 2018 Term Loan | Base Rate | Minimum                
Line of Credit Facility [Line Items]                
Basis spread on variable rate (percent)       0.00%        
Term loan | 2018 Term Loan | Base Rate | Maximum                
Line of Credit Facility [Line Items]                
Basis spread on variable rate (percent)       0.75%        
Revolving Credit Facility                
Line of Credit Facility [Line Items]                
Revolving credit facility borrowing capacity $ 700,000,000   $ 700,000,000.0 $ 700,000,000        
Debt instrument term (in years)     4 years          
Number of extensions allowed | extension_option     2          
Term of allowable extension (in months)     6 months          
Facility fee (percent) 0.20%              
One-month LIBOR (percent) 0.10%     0.10%        
Repayment of outstanding borrowings     $ 100,000,000.0 $ 71,000,000        
Revolving Credit Facility | Minimum                
Line of Credit Facility [Line Items]                
Facility fee (percent)       0.10%        
Revolving Credit Facility | Maximum                
Line of Credit Facility [Line Items]                
Facility fee (percent)       0.30%        
Revolving Credit Facility | LIBOR                
Line of Credit Facility [Line Items]                
Basis spread on variable rate (percent) 1.00%              
Base rate component, spread on variable rate (percent)       1.00%        
Revolving Credit Facility | LIBOR | Minimum                
Line of Credit Facility [Line Items]                
Basis spread on variable rate (percent)       0.775%        
Revolving Credit Facility | LIBOR | Maximum                
Line of Credit Facility [Line Items]                
Basis spread on variable rate (percent)       1.55%        
Revolving Credit Facility | Base Rate | Minimum                
Line of Credit Facility [Line Items]                
Basis spread on variable rate (percent)       0.00%        
Revolving Credit Facility | Base Rate | Maximum                
Line of Credit Facility [Line Items]                
Basis spread on variable rate (percent)       0.55%        
Revolving Credit Facility | Federal Funds Rate                
Line of Credit Facility [Line Items]                
Base rate component, spread on variable rate (percent)       0.50%