Long term debt - Summary of Components of Long-term Debt (Parenthetical) (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Term loan debt		$ 569,564	$ 552,676
Debt instrument, maturity description		The Amended 2021 Credit Agreement matures on February 8, 2026, unless the Debentures are outstanding six months prior to the December 19, 2024 maturity date thereof, in which case the Amended 2021 Credit Agreement matures on June 19, 2024. As of March 31, 2024, the Company does not anticipate repaying the Convertible Debentures by June 19, 2024 and as such, the Term Loan debt of $291.0 million, the Convertible Debentures debt of $263.6 million and the Revolving Credit Loans debt of $15.0 million are included in the current portion of long-term debt.
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Term loan debt		$ 15,000
Revolving Credit Facility [Member] | Current Portion of Long Term Debt [Member]
Debt Instrument [Line Items]
Term loan debt		15,000
Amended 2021 Credit Agreement Due 2026
Debt Instrument [Line Items]
Term loan debt	[1]	291,000	$ 291,750
Amended 2021 Credit Agreement Due 2026 | Current Portion of Long Term Debt [Member]
Debt Instrument [Line Items]
Term loan debt		291,000
Convertible Debentures [Member] | Current Portion of Long Term Debt [Member]
Debt Instrument [Line Items]
Term loan debt		$ 263,600

[1] The Amended 2021 Credit Agreement matures on February 8, 2026, unless the Debentures are outstanding six months prior to the December 19, 2024 maturity date thereof, in which case the Amended 2021 Credit Agreement matures on June 19, 2024. As of March 31, 2024, the Company does not anticipate repaying the Convertible Debentures by June 19, 2024 and as such, the Term Loan debt of $291.0 million, the Convertible Debentures debt of $263.6 million and the Revolving Credit Loans debt of $15.0 million are included in the current portion of long-term debt.