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Sale of Assets of Diamond Hill's High Yield-Focused Fund (Details) - Disposal Group, Disposed of by Sale, Not Discontinued Operations - Acquired Funds $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($)	Feb. 02, 2021 USD ($) payment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of high yield-focused advisory contracts	$ 9.0
Number of additional payments | payment		2
Additional consideration		$ 13.0

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