Document and Entity Information Document - shares	3 Months Ended
	Mar. 31, 2020	Apr. 22, 2020
Entity Information [Line Items]
Entity Incorporation, State or Country Code	DE
Title of 12(b) Security	Common stock, $0.01 par value
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	Mar. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		43,409,552
Entity Small Business	false
Entity Emerging Growth Company	false
Trading Symbol	TRS
Security Exchange Name	NASDAQ
Entity Tax Identification Number	38-2687639