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Fair value measurements - Schedule of Carrying Amount of Debt Instruments (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Carrying amount    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt $ 2,305,578 $ 2,480,578
Fair value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt $ 2,284,715 $ 2,455,032