Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Revenues
Total revenues	$ 91,704	$ 84,583	$ 267,019	$ 238,758
Consolidated variable interest entities related:
Total revenues	91,704	84,583	267,019	238,758
Expenses
Compensation and benefits	34,004	28,536	94,028	93,914
Consolidated variable interest entities related:
Total expenses	50,658	41,864	143,722	128,892
Other income (expense)
Equity in income of investees	12,924	12,138	60,181	10,938
Interest income	26	658	488	775
Non-operating income	37,043	6,229	65,500	6,830
Consolidated variable interest entities related:
Unrealized income			47,774	0
Total other income (expense)	50,669	18,342	123,914	14,856
Income before income taxes	91,715	61,061	247,211	124,722
Income tax expense	11,519	6,429	37,515	20,522
Net income	80,196	54,632	209,696	104,200
Net income attributable to Hamilton Lane Incorporated	51,849	33,203	132,161	58,263
Common Class A
Consolidated variable interest entities related:
Net income attributable to Hamilton Lane Incorporated	$ 51,849	$ 33,203	$ 132,161	$ 58,263
Basic earnings per share of Class A common stock (in dollars per share)	$ 1.44	$ 0.96	$ 3.64	$ 1.79
Diluted earnings per share of Class A common stock (in dollars per share)	1.40	0.96	3.59	1.78
Dividends declared per share of Class A common stock (in dollars per share)	$ 0.35	$ 0.313	$ 1.05	$ 0.938
Consolidated Entity Excluding Variable Interest Entities (VIE)
Expenses
General, administrative and other	$ 16,332	$ 13,328	$ 48,742	$ 34,978
Consolidated variable interest entities related:
General, administrative and other	16,332	13,328	48,742	34,978
Other income (expense)
Interest expense	(1,157)	(468)	(3,488)	(1,448)
Primary Beneficiary
Expenses
General, administrative and other	322	0	952	0
Consolidated variable interest entities related:
General, administrative and other	322	0	952	0
Other income (expense)
Interest expense	(4)	0	(4)	0
Consolidated variable interest entities related:
Equity in (loss) income of investees	(298)	(215)	170	(2,239)
Unrealized income	2,135	0	1,067	0
General Partnerships
Consolidated variable interest entities related:
Less: (loss) Income attributable to non-controlling interests	(119)	(68)	167	(346)
Hamilton Lane Advisors, L.L.C.
Consolidated variable interest entities related:
Less: (loss) Income attributable to non-controlling interests	26,181	21,497	76,849	46,283
Hamilton Lane Alliance Holdings I, Inc.
Consolidated variable interest entities related:
Less: (loss) Income attributable to non-controlling interests	2,285	0	519	0
Management and advisory fees
Revenues
Total revenues	79,836	75,279	229,653	208,913
Consolidated variable interest entities related:
Total revenues	79,836	75,279	229,653	208,913
Incentive fees
Revenues
Total revenues	11,868	9,304	37,366	29,845
Consolidated variable interest entities related:
Total revenues	11,868	9,304	37,366	29,845
Incentive fees | Consolidated Entity Excluding Variable Interest Entities (VIE)
Revenues
Total revenues	10,490	8,680	34,217	12,512
Consolidated variable interest entities related:
Total revenues	10,490	8,680	34,217	12,512
Incentive fees | Primary Beneficiary
Revenues
Total revenues	1,378	624	3,149	17,333
Consolidated variable interest entities related:
Total revenues	$ 1,378	$ 624	$ 3,149	$ 17,333