| Cover Page Cover Page | Jul. 28, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Jul. 28, 2021 |
| Entity Registrant Name | META FINANCIAL GROUP, INC |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 0-22140 |
| Entity Tax Identification Number | 42-1406262 |
| Entity Address, Address Line One | 5501 South Broadband Lane |
| Entity Address, City or Town | Sioux Falls |
| Entity Address, State or Province | SD |
| Entity Address, Postal Zip Code | 57108 |
| City Area Code | 877 |
| Local Phone Number | 497-7497 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $.01 par value |
| Trading Symbol | CASH |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000907471 |
| Amendment Flag | false |
