Quarterly report pursuant to Section 13 or 15(d)

Unsecured Line of Credit Payable - Narrative (Details)

v3.19.1
Unsecured Line of Credit Payable - Narrative (Details)
3 Months Ended
Mar. 31, 2019
USD ($)
extension_option
Dec. 31, 2018
USD ($)
Mar. 29, 2018
USD ($)
Jul. 22, 2016
USD ($)
Sep. 15, 2015
USD ($)
Interest Rate Swap          
Line of Credit Facility [Line Items]          
Derivative, notional amount $ 400,000,000        
2018 Term Loan          
Line of Credit Facility [Line Items]          
Debt instrument, fixed interest rate (percent) 2.87%        
LIBOR          
Line of Credit Facility [Line Items]          
Debt instrument variable rate (percent) 2.49%        
Line of Credit          
Line of Credit Facility [Line Items]          
Commitment fee (percent) 0.20%        
Interest rate during period (percent) 1.00%        
Line of Credit | Minimum          
Line of Credit Facility [Line Items]          
Commitment fee (percent) 0.10%        
Line of Credit | Maximum          
Line of Credit Facility [Line Items]          
Commitment fee (percent) 0.30%        
Line of Credit | LIBOR          
Line of Credit Facility [Line Items]          
Basis spread on variable rate (percent) 1.00%        
Line of Credit | LIBOR | Minimum          
Line of Credit Facility [Line Items]          
Basis spread on variable rate (percent) 0.775%        
Line of Credit | LIBOR | Maximum          
Line of Credit Facility [Line Items]          
Basis spread on variable rate (percent) 1.55%        
Line of Credit | Base Rate | Minimum          
Line of Credit Facility [Line Items]          
Basis spread on variable rate (percent) 0.00%        
Line of Credit | Base Rate | Maximum          
Line of Credit Facility [Line Items]          
Basis spread on variable rate (percent) 0.55%        
Line of Credit | Federal Funds Rate          
Line of Credit Facility [Line Items]          
Basis spread on variable rate (percent) 0.50%        
2015 Term Loan          
Line of Credit Facility [Line Items]          
Debt instrument, face amount $ 150,000,000        
2015 Term Loan | Interest Rate Swap          
Line of Credit Facility [Line Items]          
Derivative, notional amount         $ 150,000,000
Derivative, fixed interest rate (percent)         2.72%
2018 Term Loan          
Line of Credit Facility [Line Items]          
Debt instrument, face amount $ 250,000,000        
2018 Term Loan | Interest Rate Swap          
Line of Credit Facility [Line Items]          
Derivative, fixed interest rate (percent)     2.87%    
2018 Term Loan A | Interest Rate Swap          
Line of Credit Facility [Line Items]          
Derivative, notional amount     $ 150,000,000 $ 150,000,000  
Derivative, fixed interest rate (percent)     2.31%    
2018 Term Loan A | LIBOR | Minimum          
Line of Credit Facility [Line Items]          
Basis spread on variable rate (percent) 0.85%        
2018 Term Loan A | LIBOR | Maximum          
Line of Credit Facility [Line Items]          
Basis spread on variable rate (percent) 1.75%        
2018 Term Loan A | Base Rate | Minimum          
Line of Credit Facility [Line Items]          
Basis spread on variable rate (percent) 0.00%        
2018 Term Loan A | Base Rate | Maximum          
Line of Credit Facility [Line Items]          
Basis spread on variable rate (percent) 0.75%        
2018 Term Loan B          
Line of Credit Facility [Line Items]          
Derivative, notional amount     $ 100,000,000    
2018 Term Loan B | Interest Rate Swap          
Line of Credit Facility [Line Items]          
Derivative, notional amount     $ 100,000,000    
Derivative, fixed interest rate (percent)     3.71%    
Credit facility 2018          
Line of Credit Facility [Line Items]          
Line of credit, maximum borrowing capacity $ 1,500,000,000.0        
Credit facility 2018 | Line of Credit          
Line of Credit Facility [Line Items]          
Line of credit, maximum borrowing capacity $ 700,000,000.0        
Debt instrument, term 4 years        
Debt instrument, maturity date Mar. 29, 2022        
Number of extensions allowed | extension_option 2        
Term of extension 6 months        
Credit facility 2018 | 2015 Term Loan          
Line of Credit Facility [Line Items]          
Debt instrument, face amount $ 150,000,000        
Credit facility 2018 | 2018 Term Loan          
Line of Credit Facility [Line Items]          
Debt instrument, face amount $ 250,000,000        
Credit facility 2015 | Line of Credit          
Line of Credit Facility [Line Items]          
Line of credit, maximum borrowing capacity   $ 600,000,000