Debt - Summary of Debt (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Total debt, gross $ 2,533,723 $ 2,179,838
Debt discount, net (8,642) (9,272)
Deferred financing costs, net (19,464) (17,549)
Total debt, net $ 2,505,617 2,153,017
Weighted Average    
Debt Instrument [Line Items]    
Effective Interest Rates 4.08%  
Stated Interest Rate 3.64%  
Remaining Years to Maturity 6 years 10 months 24 days  
Revolving credit facilities    
Debt Instrument [Line Items]    
Total debt, gross   116,500
Revolving credit facilities | Weighted Average    
Debt Instrument [Line Items]    
Effective Interest Rates 5.12%  
Remaining Years to Maturity 2 years 6 months  
Term loans    
Debt Instrument [Line Items]    
Total debt, gross $ 178,000  
Deferred financing costs, net $ (800)  
Term loans | Weighted Average    
Debt Instrument [Line Items]    
Effective Interest Rates 3.19%  
Stated Interest Rate 1.66%  
Remaining Years to Maturity 1 year 6 months  
Senior Unsecured Notes    
Debt Instrument [Line Items]    
Total debt, gross $ 1,950,000 1,500,000
Deferred financing costs, net $ (16,000) (12,900)
Senior Unsecured Notes | Weighted Average    
Debt Instrument [Line Items]    
Effective Interest Rates 3.81%  
Stated Interest Rate 3.61%  
Remaining Years to Maturity 8 years 6 months  
CMBS    
Debt Instrument [Line Items]    
Total debt, gross $ 215,297 218,338
Deferred financing costs, net $ (2,100) (2,600)
CMBS | Weighted Average    
Debt Instrument [Line Items]    
Effective Interest Rates 5.79%  
Stated Interest Rate 5.47%  
Remaining Years to Maturity 3 years 1 month 6 days  
CMBS | Minimum    
Debt Instrument [Line Items]    
Stated Interest Rate 5.23%  
CMBS | Maximum    
Debt Instrument [Line Items]    
Stated Interest Rate 6.00%  
Convertible Notes    
Debt Instrument [Line Items]    
Effective Interest Rates 5.52%  
Stated Interest Rate 3.75%  
Remaining Years to Maturity 7 months 6 days  
Total debt, gross $ 190,426 345,000
Deferred financing costs, net $ (500) $ (2,100)