Condensed Consolidated Statements of Financial Condition (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Assets
Cash and cash equivalents	$ 149,875	$ 255,906
Restricted cash	1,123	1,144
Accounts receivable, net of allowance	110,963	62,689
Fixed assets, net of accumulated depreciation and amortization	72,298	77,206
Intangible assets, net of accumulated amortization	16,608	12,523
Goodwill	137,829	72,691
Prepaid expenses and other assets	42,675	46,776
Right-of-use lease assets	133,941	138,495
Deferred tax assets, net	164,350	129,581
Total assets	829,813	797,637
Liabilities, Redeemable Non-Controlling Interests, and Equity
Accrued compensation and benefits	127,796	210,268
Accounts payable, accrued expenses and other liabilities	45,135	47,102
Lease liabilities	179,011	186,066
Amount due pursuant to tax receivable agreement	116,662	93,461
Total liabilities	468,604	536,897
Commitments and Contingencies (Note 17)
Redeemable non-controlling interests (18,021,285 units at redemption value of $16.48 per unit as of September 30, 2026; 22,139,506 units at redemption value of $17.53 per unit as of December 31, 2025)	297,065	388,099
Equity
Preferred stock, par value $0.0001 per share (100,000,000 shares authorized, no shares issued and outstanding at September 30, 2026 and December 31, 2025)	0	0
Additional paid-in-capital	328,088	144,197
Retained earnings (accumulated deficit)	(123,576)	(130,596)
Accumulated other comprehensive income (loss)	(5,368)	(2,521)
Treasury stock, at cost (13,985,226 and 14,569,154 shares of Class A common stock at September 30, 2026 and December 31, 2025, respectively)	(135,011)	(138,449)
Total equity	64,144	(127,359)
Total liabilities, redeemable non-controlling interests, and equity	829,813	797,637
Class A Common Stock
Equity
Common stock value	9	8
Class B Common Stock
Equity
Common stock value	2	2
Related Party
Assets
Due from related parties	$ 151	$ 626

Amount due pursuant to tax receivable agreement.

No definition available.

Name:	pwp_AmountDuePursuantToTaxReceivableAgreement
Namespace Prefix:	pwp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Sum of the carrying values as of the balance sheet date of obligations incurred through that date, including liabilities incurred and payable to vendors for goods and services received, taxes, interest, rent and utilities, compensation costs, payroll taxes and fringe benefits (other than pension and postretirement obligations), contractual rights and obligations, and statutory obligations.