Annual report pursuant to Section 13 and 15(d)

DEBT FINANCING - Debt Summary (Details)

v3.20.4
DEBT FINANCING - Debt Summary (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Apr. 24, 2019
Jun. 05, 2018
Debt Instrument [Line Items]        
Principal amount $ 1,922,614 $ 1,539,260    
Unamortized debt issuance costs and debt premium, net (5,643) (5,213)    
Total debt $ 1,916,971 1,534,047    
Revolving line of credit | Credit Facility | Revolving line of credit        
Debt Instrument [Line Items]        
Effective interest rate (percent) 1.44%      
Principal amount $ 174,000 0    
Unsecured debt | Credit Facility | Term loan A        
Debt Instrument [Line Items]        
Effective interest rate (percent) 3.74%      
Principal amount $ 125,000 125,000    
Unsecured debt | Credit Facility | Term loan B        
Debt Instrument [Line Items]        
Effective interest rate (percent) 2.91%      
Principal amount $ 250,000 250,000    
Unsecured debt | Credit Facility | Term loan C        
Debt Instrument [Line Items]        
Effective interest rate (percent) 2.80%      
Principal amount $ 225,000 225,000    
Unsecured debt | Credit Facility | Term loan D        
Debt Instrument [Line Items]        
Effective interest rate (percent) 3.57%      
Principal amount $ 175,000 175,000    
Unsecured debt | 2023 Term loan facility        
Debt Instrument [Line Items]        
Effective interest rate (percent) 2.83%      
Principal amount $ 175,000 175,000   $ 175,000
Unsecured debt | 2028 Term loan facility        
Debt Instrument [Line Items]        
Effective interest rate (percent) 4.62%      
Principal amount $ 75,000 75,000    
Unsecured debt | 2029 Term loan facility        
Debt Instrument [Line Items]        
Effective interest rate (percent) 4.27%   4.27%  
Principal amount $ 100,000 100,000    
Unsecured debt | 2029 Senior Unsecured Notes        
Debt Instrument [Line Items]        
Effective interest rate (percent) 3.98%      
Principal amount $ 100,000 100,000    
Unsecured debt | 2030 Senior Unsecured Notes        
Debt Instrument [Line Items]        
Effective interest rate (percent) 2.99%      
Principal amount $ 150,000 0    
Unsecured debt | 2031 Senior Unsecured Notes        
Debt Instrument [Line Items]        
Effective interest rate (percent) 4.08%      
Principal amount $ 50,000 50,000    
Unsecured debt | 2032 Senior Unsecured Notes        
Debt Instrument [Line Items]        
Effective interest rate (percent) 3.09%      
Principal amount $ 100,000 0    
Fixed rate mortgages payable | Fixed rate mortgages payable        
Debt Instrument [Line Items]        
Effective interest rate (percent) 4.26%      
Principal amount $ 223,614 $ 264,260