Earnings per Share - Schedule of Diluted Earnings Per Share (Details) - Class A Common Stock - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | |
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Jun. 30, 2026 |
Jun. 30, 2025 |
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| Class of Stock [Line Items] | ||
| Net income attributable to HLI | $ 80,461 | $ 53,745 |
| Net income attributable to Class A common stockholders | $ 104,133 | $ 69,781 |
| Weighted-average shares of Class A common stock outstanding - basic (in shares) | 41,499,227 | 41,374,860 |
| Weighted-average shares of Class A common stock outstanding (in shares) | 54,023,617 | 54,472,249 |
| Diluted EPS of Class A common stock (in dollars per share) | $ 1.93 | $ 1.28 |
| Assumed vesting of employee awards | ||
| Class of Stock [Line Items] | ||
| Adjustments to net income: | $ 106 | $ 130 |
| Assumed vesting of employee awards (in shares) | 243,601 | 437,895 |
| Assumed conversion of Class B and Class C units | ||
| Class of Stock [Line Items] | ||
| Adjustments to net income: | $ 23,566 | $ 15,906 |
| Assumed vesting of employee awards (in shares) | 12,280,789 | 12,659,494 |
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- Definition Share-Based Compensation Arrangements And Other Adjustments Affecting Net Income (Loss) No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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