Quarterly report pursuant to Section 13 or 15(d)

Unsecured Line of Credit Payable - Narrative (Details)

v3.21.1
Unsecured Line of Credit Payable - Narrative (Details)
3 Months Ended
Mar. 31, 2021
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Mar. 31, 2018
USD ($)
extension_option
Mar. 29, 2018
USD ($)
Dec. 31, 2017
USD ($)
Jul. 22, 2016
USD ($)
Line of Credit Facility [Line Items]              
Repayment of outstanding borrowings   $ 9,000,000          
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 notional amount             $ 150,000,000.0
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 $ 700,000,000.0 $ 700,000,000.0          
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) 0.11% 0.11%          
Repayment of outstanding borrowings   $ 36,000,000   $ 100,000,000.0      
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%