Long-Term Debt - Outstanding amounts and available borrowings under Senior Secured Credit Facilities (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Long-term debt
Long-Term Debt	$ 1,570,816	$ 1,552,273	$ 1,521,079
Less: current portion	(25,651)	(26,969)	(22,121)
Long-term debt, net of current portion	1,545,165	1,525,304	1,498,958
Term Loan Facility
Long-term debt
Principal amount of borrowings	1,400,000	1,400,000	1,400,000
Less: cumulative principal payments	(40,538)	(26,523)	(37,034)
Less: unamortized original issue discount	(11,433)	(13,721)	(12,016)
Less: unamortized finance costs	(4,449)	(5,535)	(4,721)
Long-Term Debt	1,343,580	1,354,221	1,346,229
Less: current portion	(14,015)	(14,015)	(14,015)
Long-term debt, net of current portion	$ 1,329,565	$ 1,340,206	$ 1,332,214
Average interest rate (as a percent)	7.94%	7.20%	7.97%
Effective interest rate (as a percent)	8.18%	7.44%	8.21%
Revolving Credit Facility
Long-term debt
Principal amount of borrowings	$ 65,000	$ 65,000	$ 65,000
Less: outstanding letters of credit	(4,930)	(4,930)	(4,930)
Less: availability reduction due to Total Leverage Ratio	(37,320)		(37,320)
Additional letters of credit capacity	$ 22,750	$ 60,070	$ 22,750