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Variable Interest Entities and Consolidated Investment Products (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Jan. 01, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investments in equity securities accounted for under the equity method | $ 849 | $ 16,335 |
Net CIP assets included in the table above | 222,471 | 105,555 |
Net CIP assets not included in the table above | (69,763) | (28,509) |
Total Net CIP Assets | 152,708 | 77,046 |
Less: redeemable noncontrolling interests | 93,753 | 43,110 |
Artisan's direct equity investment in CIPs | 58,955 | 33,936 |
Less: Amounts reclassified to investment securities |  |  | $ 1,500
Investment securities | $ 3,656 | 23,878 |
Shares issued during period (in shares) | 24,233 |  |
Variable Interest Entity, Primary Beneficiary |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | $ 43,834 | 9,005 |
Investment securities | 230,380 | 106,736 |
Investment-related Liabilities | 15,731 | 6,186 |
Variable Interest Entity, Not Primary Beneficiary [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Artisan's direct equity investment in CIPs | 800 |  |
Recurring | Variable Interest Entity, Primary Beneficiary | Money Market Funds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 7,822 | 5,005 |
Recurring | Variable Interest Entity, Primary Beneficiary | Equity Securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities | 83,960 | 9,933 |
Recurring | Variable Interest Entity, Primary Beneficiary | Debt Securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities | 133,518 | 96,681 |
Investment-related Liabilities | 14,978 | 6,005 |
Recurring | Variable Interest Entity, Primary Beneficiary | Derivative |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities | 12,902 | 122 |
Investment-related Liabilities | 753 | 181 |
Fair Value, Inputs, Level 1 | Recurring | Variable Interest Entity, Primary Beneficiary | Money Market Funds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 7,822 | 5,005 |
Fair Value, Inputs, Level 1 | Recurring | Variable Interest Entity, Primary Beneficiary | Equity Securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities | 83,027 | 9,933 |
Fair Value, Inputs, Level 1 | Recurring | Variable Interest Entity, Primary Beneficiary | Debt Securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities | 0 | 0 |
Investment-related Liabilities | 0 | 0 |
Fair Value, Inputs, Level 1 | Recurring | Variable Interest Entity, Primary Beneficiary | Derivative |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities | 12,902 | 22 |
Investment-related Liabilities | 566 | 0 |
Fair Value, Inputs, Level 2 | Recurring | Variable Interest Entity, Primary Beneficiary | Money Market Funds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 0 | 0 |
Fair Value, Inputs, Level 2 | Recurring | Variable Interest Entity, Primary Beneficiary | Equity Securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities | 933 | 0 |
Fair Value, Inputs, Level 2 | Recurring | Variable Interest Entity, Primary Beneficiary | Debt Securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities | 133,518 | 96,681 |
Investment-related Liabilities | 14,978 | 6,005 |
Fair Value, Inputs, Level 2 | Recurring | Variable Interest Entity, Primary Beneficiary | Derivative |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities | 0 | 100 |
Investment-related Liabilities | 187 | 181 |
Fair Value, Inputs, Level 3 | Recurring | Variable Interest Entity, Primary Beneficiary | Money Market Funds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 0 | 0 |
Fair Value, Inputs, Level 3 | Recurring | Variable Interest Entity, Primary Beneficiary | Equity Securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities | 0 | 0 |
Fair Value, Inputs, Level 3 | Recurring | Variable Interest Entity, Primary Beneficiary | Debt Securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities | 0 | 0 |
Investment-related Liabilities | 0 | 0 |
Fair Value, Inputs, Level 3 | Recurring | Variable Interest Entity, Primary Beneficiary | Derivative |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities | 0 | 0 |
Investment-related Liabilities | $ 0 | $ 0 |

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