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Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Total revenues	$ 202,961	$ 212,788	$ 590,650	$ 637,092
Total receivables from contracts with customers	80,018		80,018		$ 65,622
Non-customer receivables	11,295		11,295		2,069
Accounts receivable	91,313		91,313		67,691
Contract with customer, liability	0		0		0
Artisan Funds
Disaggregation of Revenue [Line Items]
Total receivables from contracts with customers	6,280		6,280		5,418
Artisan Global Funds
Disaggregation of Revenue [Line Items]
Total receivables from contracts with customers	3,143		3,143		417
Separate Accounts
Disaggregation of Revenue [Line Items]
Total receivables from contracts with customers	70,595		70,595		$ 59,787
Management fees
Disaggregation of Revenue [Line Items]
Total revenues	202,806	212,738	586,070	634,733
Management fees | Artisan Funds
Disaggregation of Revenue [Line Items]
Total revenues	115,926	125,392	334,131	375,730
Management fees | Artisan Global Funds
Disaggregation of Revenue [Line Items]
Total revenues	8,062	9,090	24,234	26,554
Management fees | Separate Accounts
Disaggregation of Revenue [Line Items]
Total revenues	78,818	78,256	227,705	232,449
Performance fees
Disaggregation of Revenue [Line Items]
Total revenues	155	50	4,580	2,359
Performance fees | Separate Accounts
Disaggregation of Revenue [Line Items]
Total revenues	$ 155	$ 50	$ 4,580	$ 2,359

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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 of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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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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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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