Document and Entity Information Document - shares
6 Months Ended
Jun. 30, 2019
Jul. 23, 2019
Entity Information [Line Items]    
Entity Incorporation, State or Country Code DE  
Title of 12(b) Security Common stock  
Document Transition Report false  
Document Quarterly Report true  
Local Phone Number 631-5450  
City Area Code 248  
Entity Address, Postal Zip Code 48304  
Entity Address, State or Province MI  
Entity Address, City or Town Bloomfield Hills  
Entity Address, Address Line Two Suite 200  
Entity Address, Address Line One 38505 Woodward Avenue  
Entity File Number 001-10716  
Entity Shell Company false  
Entity Interactive Data Current Yes  
Entity Current Reporting Status Yes  
Entity Registrant Name TRIMAS CORPORATION  
Entity Central Index Key 0000842633  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Jun. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   45,243,642
Entity Small Business false  
Entity Emerging Growth Company false  
Trading Symbol TRS  
Security Exchange Name NASDAQ  
Entity Tax Identification Number 38-2687639