| Document and Entity Information | Apr. 07, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Apr. 07, 2023 |
| Entity File Number | 001-39964 |
| Entity Registrant Name | Home Point Capital Inc. |
| Entity Central Index Key | 0001830197 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 90-1116426 |
| Entity Address, Address Line One | 2211 Old Earhart Road |
| Entity Address, Address Line Two | Suite 250 |
| Entity Address, City or Town | Ann Arbor |
| Entity Address, State or Province | MI |
| Entity Address, Postal Zip Code | 48105 |
| City Area Code | 888 |
| Local Phone Number | 616-6866 |
| Title of 12(b) Security | Common Stock, par value $0.0000000072 per share |
| Trading Symbol | HMPT |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
