Amount due pursuant to tax receivable agreement.

No definition available.

Name:	pjt_AmountDuePursuantToTaxReceivableAgreement
Namespace Prefix:	pjt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Partnership unit exchange rate.

+ References

No definition available.

+ Details

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Namespace Prefix:	pjt_
Data Type:	xbrli:pureItemType
Balance Type:	na
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- Definition

Aggregate payment to Partnership Unitholders for exchange of Partnership Units.

+ References

No definition available.

+ Details

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Namespace Prefix:	pjt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage payment to exchanging holders of partnership units of benefits.

+ References

No definition available.

+ Details

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Namespace Prefix:	pjt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
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- Definition

The number of units converted into shares of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187171-122770

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

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Period Type:	duration

- Details

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- Details

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- Details

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Transactions With Related Parties - Additional Information (Details) $ in Thousands		3 Months Ended
	Apr. 28, 2022 shares	Mar. 31, 2022 USD ($) shares	Mar. 31, 2021 USD ($) shares	Dec. 31, 2021 USD ($)
Related Party Transaction [Line Items]
Cash settled exchange of partnership units \| $		$ 6,559	$ 48,478
Amount due to tax receivable agreement \| $		$ 31,714		$ 31,131
PJT Partners Holdings LP
Related Party Transaction [Line Items]
Exchange of partnership units settled \| shares		100,000	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	65,032
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