Business Combinations - Additional Information (Details) - USD ($)		12 Months Ended
	Oct. 02, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill		$ 72,286,000	$ 75,769,000	$ 68,873,000
Minimum
Business Acquisition [Line Items]
Estimated useful lives of intangible assets		1 year
Maximum
Business Acquisition [Line Items]
Estimated useful lives of intangible assets		15 years
PJT Capital LP
Business Acquisition [Line Items]
Business Combination, other consideration transferred		$ 0
Business combination related costs which were included in Professional Fees			$ 100,000
Goodwill	$ 6,896,000	$ 3,413,000
PJT Capital LP | Minimum
Business Acquisition [Line Items]
Estimated useful lives of intangible assets		1 year
PJT Capital LP | Maximum
Business Acquisition [Line Items]
Estimated useful lives of intangible assets		10 years
Customer Mandates
Business Acquisition [Line Items]
Estimated useful lives of intangible assets		18 months
Business combination capitalized transaction costs	0
Total purchase price	1,500,000
Business combination recognized identifiable assets acquired customer mandates	1,300,000
Acquired other assets and liabilities, net	$ 200,000