| Cover | Jan. 22, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Jan. 22, 2021 |
| Entity Registrant Name | MGP INGREDIENTS INC |
| Entity Incorporation, State or Country Code | KS |
| Entity File Number | 0-17196 |
| Entity Tax Identification Number | 45-4082531 |
| Entity Address, Address Line One | Cray Business Plaza |
| Entity Address, Address Line Two | 100 Commercial Street |
| Entity Address, Address Line Three | Box 130 |
| Entity Address, City or Town | Atchison |
| Entity Address, State or Province | KS |
| Entity Address, Postal Zip Code | 66002 |
| City Area Code | 913 |
| Local Phone Number | 367-1480 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of each class | Common Stock, no par value |
| Trading Symbol | MGPI |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0000835011 |
