Income taxes - Schedule of Cash Paid for Income Taxes, Net of Refunds Received (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Paid, by Individual Jurisdiction [Line Items]
State and local	$ 1,623	$ 738	$ 920
Foreign:
Cash paid for income taxes, net of refunds received	10,611	10,115	8,222
U.K.
Foreign:
Foreign:	8,279	8,929	6,937
Other foreign jurisdictions
Foreign:
Foreign:	$ 709	$ 448	$ 365

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Amount, after income tax refund received, of cash paid to foreign tax jurisdiction for tax on income.

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Amount, after income tax refund received, of cash paid to state and local tax jurisdictions for tax on income.

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Amount, after refund, of cash paid to foreign, federal, state, and local jurisdictions as income tax.

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