| In millions, except per share items | Mar-31-23 | Mar-31-22 | Mar-31-21 | Mar-31-20 | Mar-31-19 | Mar-31-18 | Mar-31-17 | Mar-31-16 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Revenues | | | | | | | | |
| Revenues | 528.8 | 367.9 | 341.6 | 274.0 | 252.2 | 244.0 | 179.8 | 180.8 |
| Revenues growth | 43.7% | 7.7% | 24.7% | 8.7% | 3.3% | 35.7% | -0.5% | 16.4% |
| Consolidated variable interest entities related: | | | | | | | | |
| Revenues | 528.8 | 367.9 | 341.6 | 274.0 | 252.2 | 244.0 | 179.8 | 180.8 |
| Revenues growth | 43.7% | 7.7% | 24.7% | 8.7% | 3.3% | 35.7% | -0.5% | 16.4% |
| Expenses | | | | | | | | |
| Compensation and benefits | 198.4 | 129.2 | 136.3 | 100.1 | 99.0 | 82.9 | 72.1 | 92.1 |
| |
| General, administrative and other | | | | | | | | |
| Consolidated variable interest entities related: | | | | | | | | |
| General, administrative and other | | | | | | | | |
| Total expenses | 288.7 | 198.4 | 185.9 | 157.6 | 148.0 | 121.1 | 103.7 | 119.0 |
| |
| Other income (expense) | | | | | | | | |
| Equity in income of investees | 5.1 | 78.8 | 32.4 | 20.7 | 7.5 | 17.1 | 12.8 | 1.5 |
| |
| Interest expense | | | | | | | | |
| Interest income | 1.8 | 0.5 | 1.7 | 0.7 | 0.3 | 0.5 | 0.3 | 0.2 |
| Non-operating (loss) income | -5.2 | 64.5 | 5.9 | 6.2 | 20.9 | 5.0 | 0.1 | 5.8 |
| |
| Consolidated variable interest entities related: | | | | | | | | |
| Equity in income (loss) of investees | | | | | | | | |
| Unrealized gain | | | | | | | | |
| Interest expense | | | | | | | | |
| Interest income | 1.8 | 0.5 | 1.7 | 0.7 | 0.3 | 0.5 | 0.3 | 0.2 |
| Total other income (expense) | -2.7 | 144.1 | 37.5 | 24.3 | 25.3 | 16.7 | -1.4 | 0.7 |
| Income before income taxes | 242.6 | 313.7 | 193.2 | 140.7 | 129.6 | 139.6 | 74.8 | 56.7 |
| Income tax expense | 55.4 | 66.4 | 24.4 | 14.0 | 30.6 | 33.3 | 0.3 | 0.9 |
| Net income | 187.2 | 247.3 | 168.8 | 126.8 | 99.0 | 106.3 | 74.4 | 55.9 |
| |
| Less: (loss) Income attributable to non-controlling interests | | | | | | | | |
| Net income attributable to Hamilton Lane Incorporated | 109.1 | 146.0 | 98.0 | 60.8 | 33.6 | 17.3 | 0.6 | |
| |
| Basic earnings per share of Class A common stock (in dollars per share) | | | | | | | | |
| Diluted earnings per share of Class A common stock (in dollars per share) | | | | | | | | |