Investments - Schedule of Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Equity Method Investment Balances [Roll Forward]
Investment in WMES joint ventures at beginning of the period	$ 56,189	$ 55,927
Income (loss) from joint ventures	2,908	(62)
Foreign currency translation adjustment	(523)	(1,373)
Other comprehensive gain from joint ventures	(530)	1,697
Investment in WMES joint ventures at end of the period	58,044	56,189
WMES
Equity Method Investment Balances [Roll Forward]
Investment in WMES joint ventures at beginning of the period	41,014	39,069
Income (loss) from joint ventures	(437)	248
Foreign currency translation adjustment	0	0
Other comprehensive gain from joint ventures	(530)	1,697
Investment in WMES joint ventures at end of the period	40,047	41,014
CASC Willis
Equity Method Investment Balances [Roll Forward]
Investment in WMES joint ventures at beginning of the period	15,175	16,858
Income (loss) from joint ventures	3,345	(310)
Foreign currency translation adjustment	(523)	(1,373)
Other comprehensive gain from joint ventures	0	0
Investment in WMES joint ventures at end of the period	$ 17,997	$ 15,175