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Fair value measurements - Additional Information (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Aug. 07, 2020
Debt Instrument [Line Items]
Business combination, contingent consideration, liability, current	$ 3.6	$ 3.1
3.875% Senior Unsecured Notes due 2028 | Senior Notes
Debt Instrument [Line Items]
Stated percentage	3.875%	3.875%	3.875%
Long-term debt, fair value	$ 252.9	$ 225.1

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Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled within one year or the normal operating cycle, if longer.

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