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Debt - Additional Information (Details)
3 Months Ended
Mar. 26, 2020
CAD ($)
tranche
extension
Sep. 24, 2019
Sep. 23, 2019
Dec. 04, 2018
USD ($)
Dec. 03, 2018
USD ($)
Nov. 06, 2018
USD ($)
May 01, 2013
USD ($)
instrument
warehouse
Mar. 31, 2020
USD ($)
Mar. 31, 2019
USD ($)
Mar. 31, 2020
CAD ($)
Mar. 31, 2020
USD ($)
Mar. 26, 2020
USD ($)
tranche
extension
Dec. 31, 2019
USD ($)
Apr. 26, 2019
USD ($)
Debt Instrument [Line Items]                            
Term of debt 5 years                          
Loss on debt extinguishment and modifications               $ 781,000 $ 0          
Line of Credit | Revolving Credit Facility                            
Debt Instrument [Line Items]                            
Unamortized debt issuance cost                     $ 7,200,000   $ 2,800,000  
Line of Credit | Revolving Credit Facility | 2020 Senior Unsecured Revolving Credit Facility                            
Debt Instrument [Line Items]                            
Term of debt 4 years                          
Revolver borrowing capacity                       $ 800,000,000    
Unamortized debt issuance cost                       $ 5,200,000    
Number of extensions | extension 2                     2    
Extension term 6 months                          
Extension fee 0.0625%                     0.0625%    
Letter of credit amount outstanding                     22,800,000      
Line of Credit | Revolving Credit Facility | 2018 Senior Unsecured Revolving Credit Facility                            
Debt Instrument [Line Items]                            
Revolver borrowing capacity       $ 800,000,000.0 $ 450,000,000.0             $ 800,000,000    
Letter of credit amount outstanding                         23,000,000.0  
Change in fee on unused borrowing capacity       (0.50%)                    
Revolver borrowing capacity, foreign currencies       $ 400,000,000                    
Fee on unused borrowing capacity   0.20%                        
Line of Credit | Revolving Credit Facility | 2018 Senior Unsecured Term Loan A Facility                            
Debt Instrument [Line Items]                            
Unamortized debt issuance cost       $ 8,900,000                 $ 6,100,000  
Threshold for fee on unused borrowing capacity   50.00%                        
Line of Credit | Revolving Credit Facility | 2020 Senior Unsecured Term Loan A Facility and Senior Unsecured Credit Facility                            
Debt Instrument [Line Items]                            
Change in applicable interest rate (0.05%)                          
Line of Credit | Revolving Credit Facility | LIBOR | 2020 Senior Unsecured Revolving Credit Facility                            
Debt Instrument [Line Items]                            
Applicable interest rate               0.85%            
Line of Credit | Revolving Credit Facility | LIBOR | 2018 Senior Unsecured Revolving Credit Facility                            
Debt Instrument [Line Items]                            
Applicable interest rate               0.90%            
Line of Credit | Revolving Credit Facility | LIBOR | 2018 Senior Unsecured Term Loan A Facility                            
Debt Instrument [Line Items]                            
Applicable interest rate   1.00% 1.45% 1.45% 2.35%                  
Term Loans | 2018 Senior Unsecured Term Loan A Facility                            
Debt Instrument [Line Items]                            
Face amount of debt                       $ 475,000,000    
Term Loans | Total 2020 Senior Unsecured Term Loan A Facility                            
Debt Instrument [Line Items]                            
Term of debt 5 years                          
Number of tranches | tranche 2                     2    
Unamortized debt issuance cost                     $ 8,200,000 $ 3,200,000    
Term Loans | 2020 Senior Unsecured Term Loan Tranche A-1                            
Debt Instrument [Line Items]                            
Face amount of debt                       425,000,000.0    
Term Loans | 2020 Senior Unsecured Term Loan Tranche A-2                            
Debt Instrument [Line Items]                            
Face amount of debt $ 250,000,000.0                 $ 250,000,000.0        
Term Loans | LIBOR | 2018 Senior Unsecured Term Loan A Facility                            
Debt Instrument [Line Items]                            
Applicable interest rate               0.95%            
Term Loans | LIBOR | 2020 Senior Unsecured Term Loan Tranche A-1                            
Debt Instrument [Line Items]                            
Applicable interest rate               0.95%            
Line of Credit and Term Notes | 2020 Senior Unsecured Term Loan A Facility and Senior Unsecured Credit Facility                            
Debt Instrument [Line Items]                            
Total borrowing capacity                       $ 1,400,000,000    
Maximum leverage ratio 60.00%                     60.00%    
Maximum leverage ratio after material acquisition 65.00%                     65.00%    
Minimum unencumbered leverage ratio 60.00%                     60.00%    
Minimum unencumbered leverage ratio after material acquisition 65.00%                     65.00%    
Maximum secured leverage ratio 40.00%                     40.00%    
Maximum secured leverage ratio after material acquisition 45.00%                     45.00%    
Minimum fixed charge coverage ratio 1.50                     1.50    
Minimum unsecured interest coverage ratio 1.75                     1.75    
Senior Notes | Senior Unsecured Notes                            
Debt Instrument [Line Items]                            
Maximum leverage ratio                   60.00% 60.00%      
Minimum unencumbered leverage ratio                   60.00% 60.00%      
Maximum secured leverage ratio                   40.00% 40.00%      
Minimum fixed charge coverage ratio                   1.50 1.50      
Minimum principal for repayment of debt           5.00%                
Notice period for repayment of debt           10 days                
Principal repayment if change in control occurs           100.00%                
Minimum unsecured debt service ratio                 2.00          
Senior Notes | Series C 4.10% notes due 2030                            
Debt Instrument [Line Items]                            
Face amount of debt                           $ 350,000,000.0
Fixed interest rate                   4.10% 4.10%     4.10%
Senior Notes | Series A 4.68% notes due 2026                            
Debt Instrument [Line Items]                            
Face amount of debt           $ 200,000,000.0                
Fixed interest rate           4.68%       4.68% 4.68%      
Senior Notes | Series B 4.86% notes due 2029                            
Debt Instrument [Line Items]                            
Face amount of debt           $ 400,000,000.0                
Fixed interest rate           4.86%       4.86% 4.86%      
Senior Notes | Discount Rate | Senior Unsecured Notes                            
Debt Instrument [Line Items]                            
Discount rate           0.0050                
Mortgage Loans | 2010 CMBS Financing                            
Debt Instrument [Line Items]                            
Indebtedness repaid           $ 600,000,000.0                
Mortgage Loans | 2013 Mortgage Loans                            
Debt Instrument [Line Items]                            
Face amount of debt             $ 322,000,000.0              
Number of properties | warehouse             15              
Restricted cash associated with debt                     $ 3,400,000      
Minimum borrowing base debt service coverage ratio             1.10              
Mezzanine Notes | 2013 Mortgage Loans                            
Debt Instrument [Line Items]                            
Number of notes | instrument             2              
Number of warehouses acquired | warehouse             2              
Minimum | Line of Credit | Revolving Credit Facility | 2018 Senior Unsecured Revolving Credit Facility                            
Debt Instrument [Line Items]                            
Change in fee on unused borrowing capacity   (0.05%)                        
Minimum | Mortgage Loans | 2013 Mortgage Loans                            
Debt Instrument [Line Items]                            
Fixed interest rate             3.81%              
Maximum | Line of Credit | Revolving Credit Facility | 2018 Senior Unsecured Revolving Credit Facility                            
Debt Instrument [Line Items]                            
Change in fee on unused borrowing capacity   (0.15%)                        
Maximum | Mortgage Loans | 2013 Mortgage Loans                            
Debt Instrument [Line Items]                            
Fixed interest rate             11.50%