Subsequent events (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 26, 2026	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Subsequent Event [Line Items]
Loss on early extinguishment of debt		$ (107)	$ 0	$ 0
4.30% unsecured senior notes payable
Subsequent Event [Line Items]
Outstanding Balance		$ 300,000
Stated interest rate (as a percent)		4.30%
Subsequent Event | 4.30% unsecured senior notes payable
Subsequent Event [Line Items]
Outstanding Balance	$ 300,000
Stated interest rate (as a percent)	4.30%
Loss on early extinguishment of debt	$ 0