v2.4.0.6
Document and Entity Information Document
9 Months Ended
Sep. 30, 2011
Oct. 27, 2011
Entity Information [Line Items]    
Entity Registrant Name TRIMAS CORP  
Entity Central Index Key 0000842633  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Document Type 10-Q  
Document Period End Date Sep. 30, 2011  
Document Fiscal Year Focus 2011  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   34,608,263