Transactions With Related Parties - Additional Information (Details) $ / shares in Units, $ in Thousands		12 Months Ended
	Feb. 08, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($)
Related Party Transaction [Line Items]
Cash settled exchange of partnership units		$ 109,574	$ 101,895	$ 18,953
Amount due to tax receivable agreement		31,131	$ 19,573
Tax receivable agreement, 2022		1,400
Tax receivable agreement, 2023		2,200
Tax receivable agreement, 2024		2,200
Tax receivable agreement, 2025		2,200
Tax receivable agreement, 2026		2,200
Tax receivable agreement, Thereafter		$ 20,900
PJT Partners Holdings LP
Related Party Transaction [Line Items]
Exchange of partnership units settled | shares		1,500,000	1,700,000
Percentage payment to exchanging holders of partnership units of benefits		85.00%
PJT Partners Holdings LP | Subsequent Event
Related Party Transaction [Line Items]
Exchange of partnership units settled | shares	103,226
Cash settled exchange of partnership units	$ 6,600
Price per partnership unit paid equal to the volume-weighted average price of share | $ / shares	$ 63.54
Class A Common Stock | PJT Partners Holdings LP
Related Party Transaction [Line Items]
Exchange of Partnership unit to shares, number of shares per each unit		1