Organization - Additional Information (Detail) - shares	Jun. 30, 2016	Dec. 31, 2015
PJT Partners Holdings LP
Organization Disclosure [Line Items]
Voting power	100.00%
Non-controlling interest percentage	47.20%
PJT Partners Holdings LP | Maximum
Organization Disclosure [Line Items]
Economic interest	100.00%
Class A Common Stock
Organization Disclosure [Line Items]
Common Stock, Shares Issued	17,966,456	17,966,456
Common Stock, Shares Outstanding	17,966,456	17,966,456
Class B Common Stock
Organization Disclosure [Line Items]
Common Stock, Shares Issued	302	300
Common Stock, Shares Outstanding	302	300