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Basis of Presentation | 12 Months Ended
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Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Basis of Presentation | Basis of Presentation TriMas Corporation ("TriMas" or the "Company"), and its consolidated subsidiaries, designs, engineers and manufactures innovative products under leading brand names for customers primarily in the consumer products, aerospace & defense, and industrial markets. In the second quarter of 2020, the Company elected to change its method of accounting for asbestos-related defense costs from accruing for probable and reasonably estimable defense costs associated with known claims expected to settle to accrue for all future defense costs for both known and unknown claims, which the Company now believes are reasonably estimable. The Company believes this change is preferable, as asbestos-related defense costs represent expenditures related to legacy activities that do not contribute to current or future revenue generating activities, and recording an estimate of the full liability for asbestos-related costs, where estimable with reasonable precision, provides a more complete assessment of the liability associated with resolving asbestos-related claims. This accounting change has been reflected as a change in accounting estimate effected by a change in accounting principle. See Note 17, "Commitments and Contingencies," for further information on this change. In the first quarter of 2020, TriMas began reporting its machined components operations, located in Stanton, California and Tolleson, Arizona, as part of its Aerospace segment. The operations were previously reported in the Specialty Products segment. The move of these operations into TriMas Aerospace facilitates achieving anticipated synergies from the February 2020 RSA Engineered Products ("RSA") acquisition, allowing the Company to better leverage the machining competencies and resources across its aerospace businesses. See Note 22, "Segment Information," for further information on each of the Company's reportable segments. In the fourth quarter of 2019, the Company completed the sale of its Lamons division (“Lamons”), a transaction entered into with an investment fund sponsored by First Reserve. Lamons was sold for approximately $136.8 million in cash, of which approximately $135.0 million was received in 2019 and the remaining $1.8 million was received in the first quarter of 2020. The financial results of Lamons were previously reported within the Company's Specialty Products segment, and are presented as discontinued operations for all periods presented in the financial statements attached hereto. See Note 5, "Discontinued Operations," for further information on the sale of Lamons and its historical financial results. The preparation of financial statements also requires management of the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities. Actual results may differ from such estimates and assumptions due to risks and uncertainties, including uncertainty in the current economic environment due to the ongoing outbreak of a new strain of the coronavirus (“COVID-19”). While the full impact of COVID-19 on the Company's operations is unknown and cannot be reasonably estimated at this time, the Company has made appropriate accounting estimates based on the facts and circumstances available as of the reporting date. To the extent there are differences between these estimates and actual results, the Company's consolidated financial statements may be materially affected. Certain prior year amounts have been reclassified to conform with current year presentation.

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- Definition The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -URI http://asc.fasb.org/topic&trid=2122149 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -URI http://asc.fasb.org/topic&trid=2197479 + Details
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