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Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	$ 232,753	$ 202,961	$ 638,531	$ 590,650
Total receivables from contracts with customers	91,743		91,743		$ 79,704
Non-customer receivables	6,677		6,677		2,164
Accounts receivable	98,420		98,420		81,868
Contract with customer, liability	0		0		0
Artisan Funds
Disaggregation of Revenue [Line Items]
Total receivables from contracts with customers	7,289		7,289		6,703
Artisan Global Funds
Disaggregation of Revenue [Line Items]
Total receivables from contracts with customers	3,524		3,524		3,588
Separate Accounts
Disaggregation of Revenue [Line Items]
Total receivables from contracts with customers	80,930		80,930		$ 69,413
Management fees
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	232,474	202,806	627,305	586,070
Management fees | Artisan Funds
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	131,942	115,926	356,318	334,131
Management fees | Artisan Global Funds
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	8,455	8,062	23,884	24,234
Management fees | Separate Accounts
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	92,077	78,818	247,103	227,705
Performance fees
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	279	155	11,226	4,580
Performance fees | Artisan Global Funds
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	14	0	14	0
Performance fees | Separate Accounts
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	$ 265	$ 155	$ 11,212	$ 4,580

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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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