Fair value measurements - Schedule of Fair Value of Long-Term Debt Outstanding (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024
Fair value, balance sheet grouping [Line Items]
Long-term debt	$ 2,353,185	$ 2,292,610	$ 2,320,297
Carrying amount
Fair value, balance sheet grouping [Line Items]
Long-term debt	2,353,185	2,292,610	2,320,297
Fair value
Fair value, balance sheet grouping [Line Items]
Long-term debt, fair value	$ 2,068,905	$ 1,963,396	$ 2,075,359

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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+ Details

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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+ Details