Goodwill and Identifiable Intangible Assets - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill impairment	$ 318,900,000	$ 830,787,000	$ 0	$ 0
Net cash payments relating to prior acquisitions			2,009,000
Net increase (reductions) relating to measurement period adjustments			18,400,000
Decrease to accounts receivable			900,000
Decrease to equipment and other fixed assets, net			10,000,000
Increase to other current liabilities			7,300,000
Decrease to accounts payable and accrued expenses			2,200,000
Increase to goodwill			16,000,000
Amortization of intangible assets		32,600,000	40,000,000	46,500,000
Impairment charges to identifiable intangible assets		$ 0	0	0
Significant Acquisitions In 2021
Goodwill [Line Items]
Net cash payments relating to prior acquisitions			$ 2,000,000	$ (700,000)