Investment Securities - Investments, Debt and Equity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Seed Investments
Marketable Securities [Line Items]
Seed investments in equity securities	$ 70,078	$ 66,349
Seed investments in equity securities accounted for under the equity method	2,119	7,964
Long-Term Cash Awards
Marketable Securities [Line Items]
Seed investments in equity securities	167,055	127,430
Seed investments in equity securities accounted for under the equity method	18,157	7,049
Consolidated Entity, Excluding VIE
Marketable Securities [Line Items]
Total investment securities	$ 257,409	$ 208,792

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

Artisan Partners Asset Management Inc. 10-Q