| Cover | 9 Months Ended |
| Sep. 30, 2022 shares | |
| Cover [Abstract] | |
| Document Type | 10-Q/A |
| Document Quarterly Report | true |
| Document Period End Date | Sep. 30, 2022 |
| Document Transition Report | false |
| Entity File Number | 001-38466 |
| Entity Registrant Name | GOOSEHEAD INSURANCE, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 82-3886022 |
| Entity Address, Address Line One | 1500 Solana Blvd, Building 4, Suite 4500WestlakeTexas |
| Entity Address, City or Town | Westlake |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 76262 |
| City Area Code | 469 |
| Local Phone Number | 480-3669 |
| Title of 12(b) Security | Class A Common Stock, par value $.01 per share |
| Trading Symbol | GSHD |
| Security Exchange Name | NASDAQ |
| Entity Current Reporting Status | Yes |
| Entity Interactive Data Current | Yes |
| Entity Filer Category | Large Accelerated Filer |
| Entity Small Business | false |
| Entity Emerging Growth Company | false |
| Entity Shell Company | false |
| Entity Common Stock, Shares Outstanding | 21,147,289 |
| Entity Central Index Key | 0001726978 |
| Document Fiscal Year Focus | 2022 |
| Document Fiscal Period Focus | Q3 |
| Amendment Flag | false |
| Current Fiscal Year End Date | --12-31 |
