Goodwill and Identifiable Intangible Assets - Schedule of Activity in the Goodwill Balance (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 821,214,000	$ 897,795,000	$ 906,962,000
Goodwill impairment	(238,200,000)	0	0
Effect of foreign currency translation	23,461,000	(76,581,000)	(9,167,000)
Goodwill, Ending Balance	606,475,000	821,214,000	897,795,000
MCM
Goodwill [Roll Forward]
Goodwill, Beginning Balance	148,936,000	148,936,000	148,936,000
Goodwill impairment	0
Effect of foreign currency translation	0	0	0
Goodwill, Ending Balance	148,936,000	148,936,000	148,936,000
Cabot
Goodwill [Roll Forward]
Goodwill, Beginning Balance	672,278,000	748,859,000	758,026,000
Goodwill impairment	(238,200,000)
Effect of foreign currency translation	23,461,000	(76,581,000)	(9,167,000)
Goodwill, Ending Balance	$ 457,539,000	$ 672,278,000	$ 748,859,000