XML 28 R11.htm IDEA: XBRL DOCUMENT
v3.20.2

Impairment Goodwill Impairment (Notes) | 9 Months Ended
--- | ---
Sep. 30, 2020
Goodwill Impairment Disclosure [Abstract] |
Goodwill Disclosure [Text Block] | The Company assesses its long-lived assets for impairment when events and circumstances indicate that the carrying amount of the assets may not be recoverable. Long-lived assets consist primarily of buildings, machinery and equipment. During the three months ended September 30, 2020, the Company did not identify any indicators of impairment for such assets in light of the economic impacts from COVID-19 or otherwise. The Company annually assesses goodwill for impairment on December 1st of each year or more frequently when events or circumstances indicate that the carrying amount of a reporting unit that includes goodwill exceeds its fair value. The Company evaluated whether triggering events occurred for all reporting units that include goodwill and determined that triggering events did occur during the first three months of 2020 for the Aluminum Extrusions’ reporting units created as a result of acquisitions in 2012 (“AACOA”) and in 2017 (“Futura”). During the first three months of 2020, the Company performed goodwill impairment tests for the AACOA and Futura reporting units using a combination of income and market approaches and determined that the fair value of the Futura reporting unit exceeded its carrying value. As a result, the Company recognized a goodwill impairment charge of $13.7 million ($10.5 million after taxes), which represented the entire amount of goodwill associated with the AACOA reporting unit. The operations of the AACOA reporting unit, which includes the Niles, Michigan and Elkhart, Indiana facilities, was expected to be severely impacted by COVID-19, with over 80% of the aluminum extrusions manufactured at these facilities sold to customers that make consumer durable products, such as recreational boating and power sports vehicles, and to customers serving the building and construction and automotive markets. The Company evaluated whether triggering events occurred during the three months ended September 30, 2020 for all reporting units that include goodwill and determined no events or circumstances existed that indicated the fair value of the reporting units are below their carrying amounts. Recent disruptions to the global economy from COVID-19 make it reasonably possible that future impairment tests for long-lived assets and goodwill may be required during 2020. The Company continues to monitor developments and perform updated analyses as necessary.

X
- Definition Goodwill Impairment Disclosure [Abstract] + References No definition available. + Details
Name: | tg_GoodwillImpairmentDisclosureAbstract
Namespace Prefix: | tg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2144439 + Details
Name: | us-gaap_GoodwillDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration