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Summary of significant accounting policies (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
USD ($)
property
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Accounting policies      
Maximum expected period of sale of property (in years) 1 year    
Cost method investment ownership percentage 10.00%    
Percentage of total revenues 96.50% 97.20% 98.00%
Contract with customer, asset, allowance for credit loss $ 21,300 $ 21,400  
Minimum percentage of taxable income to be distributed 90.00%    
Percent of taxable income, generally distributed as dividend 100.00%    
Income from rentals      
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration] Total revenues    
Operating leases $ 3,005,137 2,802,567 $ 2,534,862
Direct financing leases 2,653 2,608 3,094
Total revenues 3,116,394 2,885,699 2,588,962
Revenues subject to the lease accounting standard 3,007,790 2,805,175 2,537,956
Income from rentals      
Income from rentals      
Total revenues 3,049,706 2,842,456 2,576,040
Revenues subject to the revenue recognition accounting standard 41,900 37,300  
Income from rentals | Cumulative Effect, Period of Adoption, Adjustment      
Income from rentals      
Revenues subject to the revenue recognition accounting standard 41,916 37,281 38,084
Other income      
Income from rentals      
Total revenues $ 66,688 $ 43,243 $ 12,922
Canada      
Accounting policies      
Number of real estate properties | property 11    
Maximum | Buildings and building improvements      
Accounting policies      
Estimated useful life 40 years    
Maximum | Land improvements      
Accounting policies      
Estimated useful life 20 years