| Document and Entity Information | Mar. 15, 2021 |
| Cover [Abstract] | |
| Entity Registrant Name | TRIMAS CORP |
| Amendment Flag | false |
| Entity Central Index Key | 0000842633 |
| Document Type | 8-K |
| Document Period End Date | Mar. 15, 2021 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-10716 |
| Entity Tax Identification Number | 38-2687639 |
| Entity Address, Address Line One | 38505 Woodward Avenue |
| Entity Address, Address Line Two | Suite 200 |
| Entity Address, City or Town | Bloomfield Hills |
| Entity Address, State or Province | MI |
| Entity Address, Postal Zip Code | 48304 |
| City Area Code | (248) |
| Local Phone Number | 631-5400 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common stock, $0.01 par value |
| Trading Symbol | TRS |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
