XML 57 R39.htm IDEA: XBRL DOCUMENT
v3.23.2

Derivative Financial Instruments (Narrative) (Details) R$ in Thousands, $ in Thousands, lbs in Millions | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2023 USD ($) lbs | Jun. 30, 2023 BRL (R$) | Jun. 30, 2023 BRL (R$) lbs | Dec. 31, 2022 USD ($) lbs
Derivative [Line Items] |  |  |  |
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months | $ (1,800) |  |  |
Aluminum Futures Contracts |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Notional Amount | $ 17,000 |  |  | $ 30,700
Commitment Under Cash Flow Hedges, Mass | lbs | 11.1 |  | 11.1 | 20.3
Terphane Ltda [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Notional Amount | $ 19,970 |  | R$ 115,443 |
Terphane Ltda [Member] | Oct-2018 [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Annual Net Costs Mismatch Translation Exposure - Real vs US Dollar | R$ |  | R$ 177,000 |  |

X
- Definition Annual Net Costs Mismatch Translation Exposure - Real vs US Dollar + References No definition available. + Details
Name: | tg_AnnualNetCostsMismatchTranslationExposureRealvsUSDollar
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Commitment Under Cash Flow Hedges, Mass + References No definition available. + Details
Name: | tg_CommitmentUnderCashFlowHedgesMass
Namespace Prefix: | tg_
Data Type: | dtr-types1:weightItemType
Balance Type: | na
Period Type: | instant

X
- Definition The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480870/815-30-50-1 + Details
Name: | us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480237/815-40-50-5 + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-1B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-1A + Details
Name: | us-gaap_DerivativeNotionalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=tg_AluminumFuturesContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=tg_TerphaneLtdaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tg_CashFlowHedgeMaturityDateAxis=tg_Oct2018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |