Silvercrest Asset Management Group LLC Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Acquisitions - Additional Information (Detail)

Acquisitions - Additional Information (Detail) - USD ($)							3 Months Ended								12 Months Ended
	Jul. 30, 2021	Jul. 01, 2019	Apr. 12, 2019	Dec. 13, 2018	Dec. 15, 2015	Mar. 30, 2015	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Revenue							$ 33,804,000	$ 33,461,000	$ 33,101,000	$ 31,237,000	$ 28,415,000	$ 27,182,000	$ 24,021,000	$ 28,365,000	$ 131,603,000	$ 107,983,000	$ 102,152,000
Income before provision for income taxes															31,869,000	22,872,000	20,590,000
Contingent purchase price payment															3,045,000	741,000	425,000
Earn out payments percentage on revenue due thereafter					19.00%
Earn out payments percentage on EBITDA due in five years						20.00%
Earn Out Payments Percentage On EBITDA Due thereafter						20.00%
Cortina Asset Management, LLC
Business Acquisition [Line Items]
Aggregate purchase amount															57,824,000
Equity consideration for SLP acquired							16,300,000				15,100,000				16,300,000	15,100,000
Fair value adjustments to contingent purchase price consideration															5,670,000	1,100,000	200,000
Revenue															14,739,000	5,569,000
Income before provision for income taxes															11,642,000	3,016,000
Cash paid on date of acquisition																	35,169,000
Cash paid on date of acquisition															17,072,000
Cortina Asset Management, LLC \| Purchase Agreement
Business Acquisition [Line Items]
Aggregate purchase amount		$ 33,577,000
Percentage to acquire business in cash			80.00%
Additional percentage to acquire business in cash		80.00%
Business combination consideration partially offset by net closing credits		$ 35,072,000
Equity consideration for SLP acquired		13,800,000
Business combination acquired revenue			$ 13,027,000
Cortina Asset Management, LLC \| Purchase Agreement \| Revenue Exceeded 95% for July 1, 2020 to June 30, 2021
Business Acquisition [Line Items]
Business combination contingent consideration first retention payment			3,370,000						$ 3,370,000
Business combination contingent consideration first retention payment paid in cash	$ 2,696,000
Business combination contingent consideration first retention payment paid in equity	$ 674,000
Cortina Asset Management, LLC \| Purchase Agreement \| Revenue Equal to 75% or Less for July 1, 2020 to June 30, 2021
Business Acquisition [Line Items]
Business combination contingent consideration first retention payment			0
Cortina Asset Management, LLC \| Purchase Agreement \| Revenue Between 75% and 95% for July 1, 2020 to June 30, 2021
Business Acquisition [Line Items]
Business combination contingent consideration first retention payment, minimum			0
Business combination contingent consideration first retention payment, maximum			3,370,000
Cortina Asset Management, LLC \| Purchase Agreement \| Revenue Between 85% and 105% for July 1, 2021 to June 30, 2022
Business Acquisition [Line Items]
Business combination contingent consideration second retention payment, minimum			0
Business combination contingent consideration second retention payment, maximum			5,617,000
Cortina Asset Management, LLC \| Purchase Agreement \| Revenue Equal to 85% or Less for July 1, 2021 to June 30, 2022
Business Acquisition [Line Items]
Business combination contingent consideration second retention payment			0
Cortina Asset Management, LLC \| Purchase Agreement \| Revenue Between 95% and 140% for July 1, 2022 to June 30, 2023
Business Acquisition [Line Items]
Business combination contingent consideration growth payment, minimum			0
Business combination contingent consideration growth payment, maximum			17,222,000
Cortina Asset Management, LLC \| Purchase Agreement \| Revenue Equal to 95% or Less for July 1, 2022 to June 30, 2023
Business Acquisition [Line Items]
Business combination contingent consideration growth payment			0
Cortina Asset Management, LLC \| Purchase Agreement \| Maximum
Business Acquisition [Line Items]
Aggregate purchase amount			44,937,000
Additional aggregate purchase amount		26,209,000
Cortina Asset Management, LLC \| Purchase Agreement \| Maximum \| Revenue Between 85% and 105% for July 1, 2021 to June 30, 2022
Business Acquisition [Line Items]
Business combination contingent consideration second retention payment			5,617,000
Cortina Asset Management, LLC \| Purchase Agreement \| Maximum \| Revenue Between 95% and 140% for July 1, 2022 to June 30, 2023
Business Acquisition [Line Items]
Business combination contingent consideration growth payment			$ 17,222,000
Cortina Asset Management, LLC \| Purchase Agreement \| Silvercrest L.P
Business Acquisition [Line Items]
Percentage of business combination consideration issuance			20.00%
Additional aggregate purchase amount		$ 8,952,000
Additional percentage of earn out payment paid in cash		20.00%
Potential earn-out payments period		4 years
Issuance of common stock		662,713
Neosho
Business Acquisition [Line Items]
Equity consideration for SLP acquired				$ 20,000			563,000				1,028,000				563,000	1,028,000
Fair value adjustments to contingent purchase price consideration															365,000	75,000	283,000
Cash paid on date of acquisition				399,000													399,000
Contingent consideration				1,686,000
Expected payments on first anniversary of closing date				300,000
Earn out payments due in two years				100,000
Earn out payments due in three years				100,000
Earn out payments due in four years				100,000
Earn out payments due in five years				$ 100,000
Percentage of product to obtain earn out payment				50.00%
Percentage of earn out payment paid in cash				75.00%
Percentage of earn out payment paid in equity				25.00%
Contingent purchase price payment															100,000	300,000
Cappiccille
Business Acquisition [Line Items]
Equity consideration for SLP acquired							0				114,000				0	114,000
Fair value adjustments to contingent purchase price consideration															0	126,000	25,000
Contingent consideration					$ 354,000
Contingent purchase price payment															114,000	113,000
Cash paid on date of acquisition					$ 148,000
Earn out payments percentage on revenue remainder of fiscal year					19.00%
Earn out payments percentage on revenue due in two years					19.00%
Earn out payments percentage on revenue due in three years					19.00%
Earn out payments percentage on revenue due in four years					19.00%
Jamison
Business Acquisition [Line Items]
Equity consideration for SLP acquired						$ 3,562,000	$ 0				$ 160,000				0	160,000
Fair value adjustments to contingent purchase price consideration															0	70,000	$ 214,000
Contingent consideration						1,429,000
Contingent purchase price payment															$ 160,000	$ 328,000
Cash paid on date of acquisition						$ 3,550,000
Earn out payments percentage on EBITDA remainder of fiscal year						20.00%
Earn out payments percentage on EBITDA due in two years						20.00%
Earn out payments percentage on EBITDA due in three years						20.00%
Earn out payments percentage on EBITDA due in four years						20.00%
Jamison \| Seller Note
Business Acquisition [Line Items]
Promissory note issued						$ 394,000
Interest on principal amount						5.00%
Jamison \| Principals Notes
Business Acquisition [Line Items]
Promissory note issued						$ 1,771,000
Interest on principal amount						5.00%