Equity-Based Compensation - 2023 Omnibus Incentive Plan (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($) employee	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Employee stock-based compensation expense
Equity-based compensation expense			$ 19,536	$ 22,044	$ 34,298
Tax benefit from equity-based compensation			(2,834)	(3,238)	(5,052)
Deficit / (excess) tax benefit from equity-based compensation			965	536	(121)
Net compensation cost			17,667	19,342	29,125
Accelerated expense	$ 500	$ 2,200		2,200
Time-based awards
Employee stock-based compensation expense
Equity-based compensation expense			12,305	16,103	21,042
Accelerated expense				2,200
Time-based awards | Employees and former owner
Employee stock-based compensation expense
Accelerated expense		$ 1,400
Number of employees departed | employee		2
Performance-based awards
Employee stock-based compensation expense
Equity-based compensation expense			3,718	2,175	6,073
Bonus settled in shares
Employee stock-based compensation expense
Equity-based compensation expense			$ 3,513	$ 3,766	$ 7,183