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Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 304,949	$ 202,942	$ 595,626	$ 405,778
Total receivables from contracts with customers	115,501		115,501		$ 97,671
Non-customer receivables	6,153		6,153		2,217
Accounts receivable	121,654		121,654		99,888
Contract with customer, liability	0		0		0
Artisan Funds
Disaggregation of Revenue [Line Items]
Total receivables from contracts with customers	10,068		10,068		5,227
Artisan Global Funds
Disaggregation of Revenue [Line Items]
Total receivables from contracts with customers	5,267		5,267		4,473
Separate Accounts
Disaggregation of Revenue [Line Items]
Total receivables from contracts with customers	100,166		100,166		$ 87,971
Management fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	300,870	194,927	584,835	394,831
Management fees | Artisan Funds
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	176,863	109,697	342,670	224,376
Management fees | Artisan Global Funds
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	11,882	7,313	22,746	15,429
Management fees | Separate Accounts
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	112,125	77,917	219,419	155,026
Performance fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	4,079	8,015	10,791	10,947
Performance fees | Separate Accounts
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 4,079	$ 8,015	$ 10,791	$ 10,947

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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Amount due from parties in nontrade transactions, classified as other.

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