| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 |
| | 8-K | 10-K | 10-K | 10-K | 10-K | 10-K | S-1/A |
| Revenues: | | | | | | | |
| Revenues | 209.4 | 151.3 | 117.0 | 77.5 | 60.1 | 42.7 | 31.5 |
| Revenues growth | 38.4% | 29.3% | 51.0% | 28.8% | 40.8% | 35.7% | |
| Operating Expenses: | | | | | | | |
| Employee compensation and benefits | | 93.0 | 66.8 | 41.7 | 58.3 | 24.5 | |
| General and administrative expenses | 52.9 | 41.7 | 25.5 | 19.0 | 13.1 | 8.6 | 5.7 |
| Bad debts | | 3.0 | 1.6 | 0.7 | 1.3 | 1.1 | |
| Depreciation and amortization | | 4.9 | 3.1 | 1.9 | 1.5 | 0.9 | 0.5 |
| Total operating expenses | 52.9 | 142.6 | 97.1 | 63.4 | 74.1 | 35.1 | 26.3 |
| Income (loss) from operations | 10.1 | 8.7 | 19.9 | 14.1 | -13.9 | 7.6 | 5.1 |
| Operating margin | 4.8% | 5.7% | 17.0% | 18.2% | -23.2% | 17.8% | 16.3% |
| |
| Other Income (Expense): | | | | | | | |
| Other income | | 0.2 | 0.1 | | 0.0 | 3.5 | |
| Interest expense | -5.0 | -2.9 | -2.3 | -2.4 | -4.3 | -2.5 | |
| Income (loss) before taxes | | 6.0 | 17.7 | 11.7 | -18.2 | 8.7 | |
| Tax expense (benefit) | 2.5 | -2.3 | -1.0 | 1.3 | 0.4 | | |
| Net income (loss) | | 8.3 | 18.8 | 10.4 | -18.7 | 8.7 | |
| Less: net income (loss) attributable to non-controlling interests | | 2.9 | 9.5 | 6.8 | -9.8 | 8.7 | |
| Net income (loss) attributable to Goosehead Insurance, Inc. | 2.6 | 5.4 | 9.3 | 3.6 | -8.9 | | 4.7 |
| |
| Earnings per share: | | | | | | | |
| Basic (in dollars per share) | $0.03 | $0.28 | $0.55 | $0.24 | ($0.66) | | |
| Diluted (in dollars per share) | $0.03 | $0.26 | $0.51 | $0.22 | ($0.66) | | |
| |
| Weighted average shares of Class A common stock outstanding | | | | | | | |
| Basic (in shares) | 21.0 | 19.2 | 16.8 | 14.9 | 13.6 | | |
| Diluted (in shares) | 21.8 | 20.8 | 18.4 | 16.1 | 13.6 | | |