Investments and fair value measurements - Schedule of the Changes in the Fair Value of Level 3 Financial Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 0
Ending balance	0	$ 0
Strategic Investments
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	0	10,311	$ 12,104
Vesting and remeasurement of SARs	0	0	0
Exercises of SARs		0	0
Unrealized loss on strategic investments		(10,311)	(1,793)
Ending balance	0	0	10,311
Stock Appreciation Rights
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	7	48	462
Vesting and remeasurement of SARs	(4)	(34)	(161)
Exercises of SARs		(7)	(253)
Unrealized loss on strategic investments		0	0
Ending balance	$ 3	$ 7	$ 48