Condensed Consolidated Statements of Stockholders’ Equity (Unaudited) - USD ($) $ in Thousands	Total	Additional Paid in Capital	Retained Earnings	Noncontrolling Interests General Partnerships	Noncontrolling Interests Hamilton Lane Advisors, L.L.C.	Noncontrolling Interests Consolidated Funds	Class A Common Stock Common Stock	Class B Common Stock Common Stock
Beginning balance at Mar. 31, 2022	$ 461,486	$ 161,676	$ 185,149	$ 3,423	$ 111,185	$ 0	$ 37	$ 16
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	130,133		78,034	773	51,326
Equity-based compensation	6,816	4,702			2,114
Repurchase of Class A shares for employee tax withholding	(162)	(112)			(50)
Dividends declared	(44,413)		(44,413)
Capital distributions to non-controlling interests, net	(543)			(543)
Member distributions	(37,871)				(37,871)
Employee Share Purchase Plan share issuance	1,441	993			447		1
Adjustment of redeemable non-controlling interest to redemption value	13,071		9,016		4,055
Equity reallocation between controlling and non-controlling interests	0	(438)			438
Ending balance at Dec. 31, 2022	529,958	166,821	227,786	3,653	131,644	0	38	16
Beginning balance at Sep. 30, 2022	524,978	164,763	225,957	3,820	130,384	0	38	16
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	19,237		9,669	422	9,146
Equity-based compensation	2,835	1,956			879
Repurchase of Class A shares for employee tax withholding	(70)	(48)			(22)
Dividends declared	(14,810)		(14,810)
Capital distributions to non-controlling interests, net	(589)			(589)
Member distributions	(12,164)				(12,164)
Employee Share Purchase Plan share issuance	439	303			136
Adjustment of redeemable non-controlling interest to redemption value	0	(153)			153
Equity reallocation between controlling and non-controlling interests	10,102	0	6,970		3,132
Ending balance at Dec. 31, 2022	529,958	166,821	227,786	3,653	131,644	0	38	16
Beginning balance at Mar. 31, 2023	574,192	171,567	243,823	3,877	135,702	19,169	39	15
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	150,382		92,498	171	52,733	4,980
Equity-based compensation	9,227	6,468			2,759
Repurchase of Class A shares for employee tax withholding	(269)	(189)			(80)
Dividends declared	(50,357)		(50,357)
Capital contributions from non-controlling interests, net	143,648			724		142,924
Member distributions	(37,310)				(37,310)
Employee Share Purchase Plan share issuance	1,666	1,167			499
Deconsolidation of consolidated fund	(167,073)					(167,073)
Equity reallocation between controlling and non-controlling interests	0	2,916			(2,916)
Ending balance at Dec. 31, 2023	624,106	181,929	285,964	4,772	151,387	0	39	15
Beginning balance at Sep. 30, 2023	781,568	179,215	283,251	4,408	147,567	167,073	39	15
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	34,532		19,506	82	14,944
Equity-based compensation	3,264	2,287			977
Repurchase of Class A shares for employee tax withholding	(161)	(113)			(48)
Dividends declared	(16,793)		(16,793)
Capital contributions from non-controlling interests, net	282			282
Member distributions	(12,098)				(12,098)
Employee Share Purchase Plan share issuance	585	410			175
Deconsolidation of consolidated fund	(167,073)					(167,073)
Equity reallocation between controlling and non-controlling interests	0	130			(130)
Ending balance at Dec. 31, 2023	$ 624,106	$ 181,929	$ 285,964	$ 4,772	$ 151,387	$ 0	$ 39	$ 15