Silvercrest Asset Management Group LLC Quarterly report pursuant to Section 13 or 15(d)

Investments and Fair Value Measurements - Schedule of Inputs Used in Fair Value Measurement of Estimated Contingent Consideration (Detail) - Level 3 $ in Thousands	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Equity consideration for SLP acquired	$ 64	$ 64	$ 166	$ 166	$ 17,963
Forecasted Growth Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value measurement input of estimated contingent consideration				1.2
Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value measurement input of estimated contingent consideration				14.8