Regulated Entities - Additional Information (Details) € in Thousands, £ in Thousands, $ in Thousands, ¥ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($)	Dec. 31, 2025 GBP (£)	Dec. 31, 2025 EUR (€)	Dec. 31, 2025 JPY (¥)	Dec. 31, 2024 USD ($)	Dec. 31, 2024 HKD ($)
Hong Kong
Regulatory Authorities [Line Items]
Minimum net capital requirement						$ 3
Spain
Regulatory Authorities [Line Items]
Minimum net capital requirement \| €			€ 75
Percentage of fixed overheads	25.00%
UNITED KINGDOM
Regulatory Authorities [Line Items]
Minimum net capital requirement \| £		£ 75
Percentage of fixed overheads	25.00%
Saudi Arabia
Regulatory Authorities [Line Items]
Minimum net capital requirement \| €			€ 30
Percentage of fixed overheads	25.00%
PJT Partners LP
Regulatory Authorities [Line Items]
Minimum net capital requirement	$ 100
Percentage of aggregate indebtedness capital requirement					6.67	6.67
Net capital	372,400				$ 335,400
Net capital in excess of required net capital	$ 371,100				$ 333,600
PJT Partners Japan K.K.
Regulatory Authorities [Line Items]
Minimum net capital requirement \| ¥				¥ 10
Maximum \| PJT Partners LP
Regulatory Authorities [Line Items]
Percentage of aggregate indebtedness capital requirement	15	15	15	15

PJT Partners Inc. 10-K