Variable Interest Entities and Consolidated Investment Products (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($) numberOfProducts	Jan. 01, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deconsolidation, gain (loss), amount	$ 0
Less: redeemable noncontrolling interest	97,391		$ 93,753
Artisan’s direct equity investment in CIPs	$ 54,500
Artisan Global Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of consolidated VIEs | numberOfProducts	3
Artisan Private Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of consolidated VIEs | numberOfProducts	2
Variable Interest Entity, Not Primary Beneficiary
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents		$ 34,823
Investments		72,868
Investment liabilities, at fair value		566
Less: redeemable noncontrolling interest		$ 20,734
Artisan’s direct equity investment in CIPs	$ 11,100
Variable Interest Entity, Primary Beneficiary
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	16,582		43,834	$ 29,880
Investments	175,918		230,380
Investment liabilities, at fair value	13,163		15,731
Net CIP assets included in the table above	179,222		222,471
Net CIP assets/(liabilities) not included in the table above	(27,311)		(69,763)
Total Net CIP assets	151,911		152,708
Artisan’s direct equity investment in CIPs	54,520		58,955
Fair Value, Measurements, Recurring | Variable Interest Entity, Primary Beneficiary | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	16,467		7,822
Fair Value, Measurements, Recurring | Variable Interest Entity, Primary Beneficiary | Equity securities - long position
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	29,806		83,960
Investment liabilities, at fair value	1,186
Fair Value, Measurements, Recurring | Variable Interest Entity, Primary Beneficiary | Fixed income instruments - long position
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	146,044		133,518
Investment liabilities, at fair value	11,790		14,978
Fair Value, Measurements, Recurring | Variable Interest Entity, Primary Beneficiary | Derivative assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	68		12,902
Investment liabilities, at fair value	187		753
Level 1 | Fair Value, Measurements, Recurring | Variable Interest Entity, Primary Beneficiary | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	16,467		7,822
Level 1 | Fair Value, Measurements, Recurring | Variable Interest Entity, Primary Beneficiary | Equity securities - long position
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	29,174		83,027
Investment liabilities, at fair value	1,186
Level 1 | Fair Value, Measurements, Recurring | Variable Interest Entity, Primary Beneficiary | Fixed income instruments - long position
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0		0
Investment liabilities, at fair value	0		0
Level 1 | Fair Value, Measurements, Recurring | Variable Interest Entity, Primary Beneficiary | Derivative assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	68		12,902
Investment liabilities, at fair value	0		566
Level 2 | Fair Value, Measurements, Recurring | Variable Interest Entity, Primary Beneficiary | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0		0
Level 2 | Fair Value, Measurements, Recurring | Variable Interest Entity, Primary Beneficiary | Equity securities - long position
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	632		933
Investment liabilities, at fair value	0
Level 2 | Fair Value, Measurements, Recurring | Variable Interest Entity, Primary Beneficiary | Fixed income instruments - long position
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	146,044		133,518
Investment liabilities, at fair value	11,790		14,978
Level 2 | Fair Value, Measurements, Recurring | Variable Interest Entity, Primary Beneficiary | Derivative assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0		0
Investment liabilities, at fair value	187		187
Level 3 | Fair Value, Measurements, Recurring | Variable Interest Entity, Primary Beneficiary | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0		0
Level 3 | Fair Value, Measurements, Recurring | Variable Interest Entity, Primary Beneficiary | Equity securities - long position
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0		0
Investment liabilities, at fair value	0
Level 3 | Fair Value, Measurements, Recurring | Variable Interest Entity, Primary Beneficiary | Fixed income instruments - long position
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0		0
Investment liabilities, at fair value	0		0
Level 3 | Fair Value, Measurements, Recurring | Variable Interest Entity, Primary Beneficiary | Derivative assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0		0
Investment liabilities, at fair value	$ 0		$ 0