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Revenue from Contract with Customer (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Contract with Customer, Asset, after Allowance for Credit Loss	$ 0
Revenue from Contracts with Customers	899,567	$ 798,952	$ 828,635
Total receivables from contracts with customers	97,671	79,704
Non-customer receivables	2,217	2,164
Accounts receivable	99,888	81,868
Artisan Funds
Disaggregation of Revenue [Line Items]
Total receivables from contracts with customers	5,227	6,703
Artisan Global Funds
Disaggregation of Revenue [Line Items]
Total receivables from contracts with customers	4,473	3,588
Separate Accounts [Member]
Disaggregation of Revenue [Line Items]
Total receivables from contracts with customers	87,971	69,413
Management fees
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	884,902	794,338	825,679
Management fees | Artisan Funds
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	503,642	452,504	487,041
Management fees | Artisan Global Funds
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	33,531	32,332	35,007
Management fees | Separate Accounts [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	347,729	309,502	303,631
Performance fees
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	14,665	4,614	2,956
Performance fees | Artisan Global Funds
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	15	0	0
Performance fees | Separate Accounts [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	$ 14,650	$ 4,614	$ 2,956

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Amount, before 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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Amount due from customers for fees and charges arising from transactions related to the entity's brokerage activities and operations.

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