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Acquisitions (Tables) | 12 Months Ended
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Dec. 31, 2012
Business Combinations [Abstract] |
Redeemable Noncontrolling Interest |
|  | Year ended December 31, 2012
|  | (dollars in thousands)
Beginning balance, February 24, 2012 |  | $ | 25,630 |
Distributions to noncontrolling interests |  | (1,260 | )
Net income attributable to noncontrolling interests |  | 2,410 |
Ending balance, December 31, 2012 |  | $ | 26,780 |
Schedule of Purchase Price Allocation |
|  | February 24, 2012
|  | (dollars in thousands)
Consideration |  |
Initial cash paid net of working capital adjustment |  | $ | 59,200 |
Contingent consideration (a) |  | 8,490 |
Total consideration |  | $ | 67,690 |
Recognized amounts of identifiable assets acquired and liabilities assumed |  |
Receivables |  | $ | 8,760 |
Inventories |  | 4,200 |
Intangible assets other than goodwill (b) |  | 48,400 |
Other assets |  | 2,450 |
Accounts payable and accrued liabilities |  | (4,270 | )
Long-term liabilities |  | (1,610 | )
Total identifiable net assets |  | 57,930 |
Redeemable noncontrolling interest |  | (25,630 | )
Goodwill (c) |  | 35,390 |
|  | $ | 67,690 |
__________________________ (a) The contingent consideration represented the Company's best estimate, based on its review, at the time of purchase, of the underlying potential obligations estimated at a range of $8 million to $9 million, of certain Seller tax-related liabilities for which the Company has indemnified the Sellers as part of the purchase agreement. During 2012, the Company paid $4.9 million of additional purchase price related to the contingent consideration. The remaining liability range of $3.1 million to $4.1 million continues to represent the Company's best estimate of the remaining potential obligation at December 31, 2012. (b) Consists of $33.0 million of customer relationships with an estimated 10 year useful life, $7.9 million of trademarks/trade names with an indefinite useful life and $7.5 million of technology and other intangible assets with an estimated 8 year useful life. (c)
Business Combination, Results Of Operations Of Acquiree Since Acquisition | The results of operations of Arminak are included in the Company's results beginning February 24, 2012. The actual amounts of net sales and net income of Arminak included in the accompanying consolidated statement of income are summarized as follows:
|  | Year ended December 31, 2012
|  | (dollars in thousands)
Net sales |  | $ | 65,860 |
Net income |  | $ | 8,030 |
Business Acquisition, Pro Forma Information | The following table summarizes the supplemental pro forma results of the combined entity as if the acquisition had occurred on January 1, 2011. The supplemental pro forma information presented below is for informational purposes and is not necessarily indicative of either future results of operations or results that might have been achieved had the acquisition been consummated on January 1, 2011:
|  | Pro forma Combined (a)
|  | Year ended December 31,
|  | 2012 |  | 2011
|  | (dollars in thousands)
Net sales |  | $ | 1,280,940 |  |  | $ | 1,144,020 |
Net income attributable to TriMas Corporation |  | $ | 35,850 |  |  | $ | 54,540 |
___________________________ (a) The supplemental pro forma results reflect certain adjustments, such as adjustments for acquisition costs incurred and purchase accounting adjustments related to step-up in value and subsequent amortization of inventory and intangible assets.

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- Definition The actual results of operations of the acquiree since the acquisition date that is included in the parent company's statement of income + References No definition available. + Details
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- Definition Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=7659399&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 54 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 55 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph r(2, 3) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Tabular disclosure of redeemable noncontrolling interest (as defined) included in the statement of financial position as either a liability or temporary equity. As of the date of the statement of financial position, such redeemable noncontrolling interest is currently redeemable, as defined, for cash or other assets of the entity at (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number D-98 -Paragraph 41 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number D-98 -Paragraph 42 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number D-98 -Paragraph 44 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 25 -Appendix A Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number D-98 -Paragraph 43 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number D-98 -Paragraph 40 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Tabular disclosure of all of the fair values of the purchase price and assets and liabilities acquired in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
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