Earnings per Share - Narrative (Details) shares in Thousands	3 Months Ended
Jun. 30, 2021 shares	Jun. 30, 2022
Class B Common Stock
Class of Stock [Line Items]
Common stock, conversion ratio		1
Class B and Class C Units of Hamilton Lane Advisors, L.L.C.
Class of Stock [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	17,553,234

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration