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Fair value measurements - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Business combination, contingent consideration, liability, current	$ 2.7	$ 2.7
Senior Unsecured Notes Due August 2028 | Senior Notes
Debt Instrument [Line Items]
Long-term debt, fair value	$ 191.3	$ 184.3

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- Definition

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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