Equity-Based and Other Deferred Compensation - Unvested Units After Expected Forfeitures which are Expected to Vest (Details)	6 Months Ended
Jun. 30, 2026 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Units expected to vest	5,830,411
Weighted-average service period of unit expected to vest (in years)	1 year 7 months 6 days
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Units expected to vest	5,099,229
Weighted-average service period of unit expected to vest (in years)	1 year 7 months 6 days
PJT Partners Holdings LP \| Partnership Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Units expected to vest	731,182
Weighted-average service period of unit expected to vest (in years)	1 year

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details