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LEASES - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Leases [Abstract]
Operating lease expense	$ 14,123	$ 15,033
Variable lease expense	4,880	4,622
Short-term lease expense	78	54
Less: Sublease income	(852)
Less: Sublease income		(425)
Total lease costs	$ 18,229	$ 19,284

X

- Definition

Sublease Income, Net of Adjustments

+ References

No definition available.

+ Details

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Namespace Prefix:	hli_
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Balance Type:	credit
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X

- Definition

Amount of lease cost recognized by lessee for lease contract.

+ References

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-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 53
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-Publisher FASB
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- References

No definition available.

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- Definition

Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

+ References

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X

- Definition

Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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-Topic 842
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X

- Definition

Amount of sublease income excluding finance and operating lease expense.

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X

- Definition

Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

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