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Discontinued Operations Discontinued Operations - Cequent Spin-off (Details) - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014
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Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Number of Horizon Shares Received in Spin-off | 2 |
TriMas Number of Common Shares Held | 5 |
Disposal Group, Including Discontinued Operation, Assets, Current | $ 0 | $ 197,420
Disposal Group, Including Discontinued Operation, Liabilities, Current | 0 | 119,900
Cequent businesses [Member] | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents | 17,050 | 0
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net | 92,750 | 63,520
Disposal Group, Including Discontinued Operation, Inventory, Current | 125,750 | 123,370
Disposal Group, Including Discontinued Operation, Deferred Tax Asset, Current | 4,840 | 4,840
Disposal Group, Including Discontinued Operation, Prepaid and Other Assets, Current | 6,520 | 5,690
Disposal Group, Including Discontinued Operation, Assets, Current | 246,910 | 197,420
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Noncurrent | 48,870 | 55,180
Disposal Group, Including Discontinued Operation, Goodwill, Noncurrent | 5,630 | 6,580
Disposal Group, Including Discontinued Operation, Intangible Assets, Noncurrent | 61,400 | 66,510
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent | 15,910 | 11,930
Disposal Group, Including Discontinued Operation, Assets | 378,720 | 337,620
Disposal Group, Including Discontinued Operations, Debt, Current | 17,940 | 460
Disposal Group, Including Discontinued Operation, Accounts Payable, Current | 81,830 | 81,500
Disposal Group, Including Discontinued Operation, Accrued Liabilities, Current | 44,190 | 37,940
Disposal Group, Including Discontinued Operation, Liabilities, Current | 143,960 | 119,900
Disposal Group, Including Discontinued Operations, Debt, Noncurrent | 195,460 | 300
Disposal Group, Including Discontinued Operation, Deferred Tax Liabilities, Noncurrent | 9,220 | 8,970
Disposal Group, Including Discontinued Operation, Other Liabilities, Noncurrent | 27,900 | 25,990
Disposal Group, Including Discontinued Operation, Liabilities | $ 376,540 | $ 155,160

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