Commitments and contingencies (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($) Lease	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Concentration Risk [Line Items]
Discretionary profit sharing contributions subject to statutory limitations	$ 3,500	$ 7,800	$ 8,600
Concentration of credit risk
Number of leases held | Lease	850
Commitments
Remaining aggregate costs under contracts, under terms of leases	$ 1,030,000
Letters of credit and performance obligations	5,300
Investment commitments	$ 370,300
Funding commitments expiration term	12 years
Weighted-average remaining liquidation term (in years)	5 years 6 months
Interest rate	6.50%
Financing receivable	$ 165,700
Financing receivable remaining	$ 49,200
Secured Loan
Commitments
Interest rate floor	9.00%
Debt instrument term	5 years
Secured Loan | Former Joint Venture Partner
Commitments
Contractual obligation amount	$ 50,000
Investments in privately held entities that report NAV
Commitments
Weighted-average remaining liquidation term (in years)	8 years 1 month 6 days
99 Coolidge Avenue
Commitments
Noncontrolling interest	$ 48,700
Accrued distributions	$ 844
Minimum
Commitments
Expected period of payment obligation	1 year
Maximum
Commitments
Expected period of payment obligation	3 years