Summary of significant accounting policies (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($) property	Dec. 31, 2024 USD ($)	Dec. 31, 2023 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	95.60%	96.50%	97.20%
Contract with customer, asset, allowance for credit loss	$ 14,300	$ 21,300
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	$ 2,889,721	3,005,137	$ 2,802,567
Direct financing and sales-type leases	4,496	2,653	2,608
Total revenues	3,026,556	3,116,394	2,885,699
Revenues subject to the lease accounting standard	2,894,217	3,007,790	2,805,175
Income from rentals
Income from rentals
Total revenues	2,945,175	3,049,706	2,842,456
Revenues subject to the revenue recognition accounting standard		41,900
Income from rentals | Cumulative Effect, Period of Adoption, Adjustment
Income from rentals
Revenues subject to the revenue recognition accounting standard	50,958	41,916	37,281
Other income
Income from rentals
Total revenues	$ 81,381	$ 66,688	$ 43,243
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