Quarterly report pursuant to Section 13 or 15(d)

Unsecured Lines of Credit Payable - Narrative (Details)

v3.20.2
Unsecured Lines of Credit Payable - Narrative (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2020
USD ($)
Mar. 31, 2018
USD ($)
extension_option
Jun. 30, 2020
USD ($)
Mar. 29, 2018
USD ($)
Sep. 15, 2015
USD ($)
Line of Credit Facility [Line Items]          
One-month LIBOR (percent) 0.16%   0.16%    
Interest Rate Swap          
Line of Credit Facility [Line Items]          
Derivative notional amount $ 600,000,000   $ 600,000,000    
Credit Agreement 2018          
Line of Credit Facility [Line Items]          
Credit agreement, aggregate maximum borrowing capacity including accordion feature   $ 1,500,000,000      
2015 Term Loan          
Line of Credit Facility [Line Items]          
Debt instrument face amount         $ 150,000,000.0
2015 Term Loan | Interest Rate Swap          
Line of Credit Facility [Line Items]          
Derivative notional amount 150,000,000   150,000,000   $ 150,000,000.0
Derivative, fixed interest rate (percent)         2.72%
2018 Term Loan          
Line of Credit Facility [Line Items]          
Debt instrument face amount       $ 250,000,000.0  
2018 Term Loan | Interest Rate Swap          
Line of Credit Facility [Line Items]          
Derivative, fixed interest rate (percent)   2.87%   2.87%  
2018 Term Loan A | Interest Rate Swap          
Line of Credit Facility [Line Items]          
Derivative notional amount 150,000,000 $ 150,000,000.0 150,000,000 $ 150,000,000.0  
Derivative, fixed interest rate (percent)   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 Swap          
Line of Credit Facility [Line Items]          
Derivative notional amount 100,000,000 $ 100,000,000.0 $ 100,000,000 $ 100,000,000.0  
Derivative, fixed interest rate (percent)   3.71%   3.71%  
Term Loan | 2015 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      
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%    
Term Loan | 2018 Term Loan A          
Line of Credit Facility [Line Items]          
Debt instrument face amount 150,000,000.0   $ 150,000,000.0    
Term Loan | 2018 Term Loan B          
Line of Credit Facility [Line Items]          
Proceeds from issuance of long-term debt   100,000,000.0      
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   4 years      
Number of extensions allowed | extension_option   2      
Term of allowable extensions (in months)   6 months      
Commitment fee (percent) 0.20%        
Revolving Credit Facility | Minimum          
Line of Credit Facility [Line Items]          
Commitment fee (percent)     0.10%    
Revolving Credit Facility | Maximum          
Line of Credit Facility [Line Items]          
Commitment 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%