Summary of Significant Accounting Policies (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Accounting Policies [Abstract]
Restricted cash	$ 1,123,000		$ 1,123,000		$ 1,144,000
Cash equivalents	0		0		0
Variable Interest Entity [Line Items]
Accumulated deficit due to insufficient additional paid-in capital	0	$ 28,000,000.0	0	$ 28,000,000.0
Foreign currency transaction gains (losses), before tax	(300,000)	$ 1,500,000	500,000	$ (3,000,000.0)
PWP OpCo
Variable Interest Entity [Line Items]
Net assets	$ 324,800,000		$ 324,800,000		$ 235,300,000

Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.