Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount of payment greater than the preceding installment payments to be paid at final maturity date of debt.

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Amount, after accumulated amortization, of debt discount.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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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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Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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Bank credit lines and loan facilities - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended					12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2023	May 02, 2023	Jul. 01, 2021
Debt Instrument [Line Items]
Drawdown of credit lines and loan facilities	$ 50,000				$ 180,000
Repayments of senior debt	55,000
Line of credit facility, remaining borrowing capacity	50,000	$ 55,000				$ 55,000
Long-term debt at fair value	$ 3,501,400	$ 3,793,500				$ 3,793,500
Senior secured credit facility and senior secured notes \| Senior Secured Term Loan
Debt Instrument [Line Items]
Debt discount paid								$ 27,600
Senior Secured Term Loan \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (in percent)	0.50%
Senior Secured Term Loan \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate (in percent)	2.00%
Senior Secured Term Loan \| Senior Secured Term Loan
Debt Instrument [Line Items]
Debt instrument, principal amount								$ 5,515,000
Debt instrument, interest rate (in percent)	7.302%	7.86%				7.86%		1.00%
Accelerated charge on repayments	$ 2,000				2,200
Senior Secured Revolving Loan \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Variable rate component two \| Standard & Poor's, BB Rating
Debt Instrument [Line Items]
Basis spread on variable rate (in percent)	1.45%
Senior Secured Revolving Loan \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Variable rate component two \| Standard & Poor's, BB+ Rating
Debt Instrument [Line Items]
Basis spread on variable rate (in percent)	1.10%
Senior Secured Revolving Loan \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Variable rate component two \| Standard & Poor's, BBB- Rating
Debt Instrument [Line Items]
Basis spread on variable rate (in percent)	0.85%
Senior Secured Revolving Loan \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Variable rate component two \| Standard & Poor's, BBB+ Rating
Debt Instrument [Line Items]
Basis spread on variable rate (in percent)	0.50%
Senior Secured Revolving Loan \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Variable rate component two \| Standard & Poor's, BBB Rating
Debt Instrument [Line Items]
Basis spread on variable rate (in percent)	0.65%
Senior Secured Revolving Loan \| Base rate \| Variable rate component one
Debt Instrument [Line Items]
Basis spread on variable rate (in percent)	0.10%
Senior Secured Revolving Loan \| Base rate \| Maximum \| Variable rate component one
Debt Instrument [Line Items]
Basis spread on variable rate (in percent)	0.45%
Senior Secured Revolving Loan \| Base rate \| Minimum \| Variable rate component one
Debt Instrument [Line Items]
Basis spread on variable rate (in percent)	0.00%
Senior Secured Revolving Loan \| Senior Secured Revolving Loan
Debt Instrument [Line Items]
Debt instrument, interest rate (in percent)	6.179%	6.72%				6.72%
Senior Secured Revolving Loan \| Senior Secured Revolving Loan \| Senior Secured Revolving Loan
Debt Instrument [Line Items]
Debt instrument, maximum borrowing capacity							$ 500,000	$ 300,000
Drawdown of credit lines and loan facilities	$ 50,000	$ 65,000	$ 75,000	$ 50,000	$ 180,000	$ 370,000
Senior Secured Notes \| Senior Secured Notes
Debt Instrument [Line Items]
Debt instrument, principal amount								$ 500,000
Debt instrument, interest rate (in percent)	2.875%	2.875%				2.875%		2.875%