| In millions, except per share items | Jun-30-22 | Mar-31-22 | Jun-30-21 | Mar-31-21 | Dec-31-20 | Jun-30-20 | Mar-31-20 | Dec-31-19 |
| | 10-Q | 10-Q | 10-Q | 10-Q | 8-K | 10-Q | 10-Q | 10-K |
| Revenues: | | | | | | | | |
| Total revenues | 65.6 | 69.6 | 75.6 | 67.9 | 71.3 | 57.6 | 69.6 | 86.3 |
| Total revenues growth | -13.3% | 2.5% | 31.4% | -2.4% | -17.3% | -24.7% | -6.4% | 6.5% |
| Expenses: | | | | | | | | |
| Compensation | 24.2 | 29.1 | 31.3 | 30.7 | | 25.5 | 29.3 | 33.2 |
| Management fee | 0.4 | 1.3 | 3.0 | 2.5 | | 2.1 | | |
| Distribution costs | 6.7 | 7.1 | 7.8 | 7.0 | | 6.6 | 7.6 | 8.7 |
| Other operating expenses | 6.1 | 6.1 | 8.7 | 5.3 | | 4.6 | 5.7 | 9.7 |
| Total expenses | 37.3 | 43.7 | 50.8 | 45.5 | | 38.8 | 44.2 | 53.2 |
| Operating income | 28.3 | 26.0 | 24.8 | 22.5 | 31.4 | 18.8 | 25.3 | 33.0 |
| Operating margin | 43.1% | 37.3% | 32.9% | 33.1% | 44.0% | 32.6% | 36.4% | 38.3% |
| |
| Non-operating income / (loss) | | | | | | | | |
| Gain/(Loss) from investments, net | -4.4 | -2.8 | 3.0 | 0.7 | | 0.3 | -10.2 | -2.2 |
| Interest and dividend income | 0.4 | 0.2 | 0.1 | 0.2 | | 0.1 | 0.5 | 0.9 |
| Interest expense | -0.8 | -0.8 | -0.6 | -0.7 | | -0.6 | -0.6 | -0.6 |
| |
| Shareholder-designated charitable contribution | | | | | | | | |
| Total non-operating income / (loss) | -4.7 | -3.4 | 2.5 | 0.2 | -3.9 | -0.2 | -10.3 | -2.0 |
| Income before income taxes | 23.5 | 22.6 | 27.3 | 22.7 | | 18.5 | | |
| Provision for income taxes | 6.2 | 5.1 | 10.2 | 6.7 | 7.8 | 7.3 | 3.7 | 6.7 |
| Net income | 17.3 | 17.5 | 17.1 | 16.0 | | 11.3 | 11.2 | 24.4 |
| |
| Earnings per share: | | | | | | | | |
| Basic (in dollars per share) | $0.66 | $0.67 | $0.65 | $0.60 | | $0.42 | $0.42 | $0.91 |
| Diluted (in dollars per share) | $0.66 | $0.66 | $0.64 | $0.59 | | $0.42 | $0.42 | $0.90 |
| |
| Weighted average shares outstanding: | | | | | | | | |
| Basic (in shares) | 26.1 | 26.2 | 26.3 | 26.4 | 26.4 | 26.6 | 26.7 | 27.4 |
| Diluted (in shares) | 26.3 | 26.5 | 26.9 | 26.9 | 26.7 | 26.7 | 26.8 | 27.5 |