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Goodwill and Other Intangible Assets Goodwill Impairment Assessment (Details) | 3 Months Ended
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Sep. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract] |
TriMas stock price decline | 30.00%

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- Definition TriMas stock price decline + References No definition available. + Details
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Namespace Prefix: | trs_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration