Variable Interest Entities and Consolidated Investment Products (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Jul. 01, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in equity securities accounted for under the equity method	$ 12,252		$ 0
Net CIP assets included in the table above	62,409		89,169
Net CIP assets not included in the table above	2,156		8,762
Total Net CIP Assets	64,565		97,931
Less: redeemable noncontrolling interests	34,349		62,581
Artisan's direct equity investment in CIPs	30,216		35,350
Cash and cash equivalents of consolidated investment products	14,443		21,881	$ 0
Accounts receivable and other of consolidated investment products	5,566		16,768
Investment assets, at fair value, of consolidated investment products	66,173		115,319
Total assets	805,014		837,155
Accounts payable, accrued expenses, and other of consolidated investment products	4,712		8,180
Investment liabilities, at fair value, of consolidated investment products	16,905		47,857
Total liabilities	630,178		666,509
Total liabilities, redeemable noncontrolling interests, and stockholders’ equity	805,014		837,155
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	13,141		21,881
Equity securities - long position	7,817		69,044
Fixed income instruments - long position	57,621		45,758
Derivative assets	735		343
Equity securities - short position	0		29,199
Fixed income instruments - short position	16,567		18,513
Derivative liabilities	338		145
Fair Value, Inputs, Level 1 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	13,141		21,881
Equity securities - long position	7,196		69,044
Fixed income instruments - long position	0		0
Derivative assets	0		303
Equity securities - short position	0		29,199
Fixed income instruments - short position	0		0
Derivative liabilities	0		45
Fair Value, Inputs, Level 2 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	0		0
Equity securities - long position	0		0
Fixed income instruments - long position	57,621		45,758
Derivative assets	735		40
Equity securities - short position	0		0
Fixed income instruments - short position	16,567		18,513
Derivative liabilities	338		100
Fair Value, Inputs, Level 3 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	0		0
Equity securities - long position	621		0
Fixed income instruments - long position	0		0
Derivative assets	0		0
Equity securities - short position	0		0
Fixed income instruments - short position	0		0
Derivative liabilities	$ 0		$ 0
Variable Interest Entity, Not Primary Beneficiary [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Less: redeemable noncontrolling interests		$ 79,631
Cash and cash equivalents of consolidated investment products		39,759
Accounts receivable and other of consolidated investment products		1,340
Investment assets, at fair value, of consolidated investment products		85,626
Less: Amounts reclassified to investment securities		(11,381)
Total assets		115,344
Accounts payable, accrued expenses, and other of consolidated investment products		6,385
Investment liabilities, at fair value, of consolidated investment products		29,328
Total liabilities		35,713
Total liabilities, redeemable noncontrolling interests, and stockholders’ equity		$ 115,344