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Variable Interest Entities and Consolidated Investment Products (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Jan. 01, 2020
Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Deconsolidation, Gain (Loss), Amount $ 0    
Net CIP assets included in the table above 91,122   $ 105,555
Net CIP assets/(liabilities) not included in the table above (27,180)   (28,509)
Total Net CIP assets 63,942   77,046
Less: redeemable noncontrolling interest 37,223   43,110
Artisan’s direct equity investment in CIPs 26,719   33,936
Fair Value, Measurements, Recurring      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Money market funds 5,146   5,005
Equity securities - long position 4,326   9,933
Fixed income instruments - long position 84,974   96,681
Derivative assets 331   122
Fixed income instruments - short position 3,514   6,005
Derivative liabilities 141   181
Level 1 | Fair Value, Measurements, Recurring      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Money market funds 5,146   5,005
Equity securities - long position 4,326   9,933
Fixed income instruments - long position 0   0
Derivative assets 331   22
Fixed income instruments - short position 0   0
Derivative liabilities 141   0
Level 2 | Fair Value, Measurements, 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 84,974   96,681
Derivative assets 0   100
Fixed income instruments - short position 3,514   6,005
Derivative liabilities 0   181
Level 3 | Fair Value, Measurements, 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 0   0
Derivative assets 0   0
Fixed income instruments - short position 0   0
Derivative liabilities $ 0   $ 0
Variable Interest Entity, Not Primary Beneficiary      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Amounts reclassified to investment securities upon deconsolidation   $ 1,500