XML 101 R79.htm IDEA: XBRL DOCUMENT
v3.19.1

Financial Instruments Financial Instruments (Summary of Location and Fair Value of Currency Forward Derivative Financial Instruments - Terphane (Details). R$ in Thousands, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2018 BRL (R$)
Derivatives, Fair Value [Line Items] |  |  |  |
Cost of Goods and Services Sold | $ 849,756 | $ 767,550 | $ 659,867 |
Terphane Ltda [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Foreign Currency Exchange Rate, Translation | 3,782.6 |  |  | 3,782.6
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  | 0.00%
Derivative, Notional Amount, Net | $ 22,950 |  |  | R$ 86,812
Flexible Packaging Films [Member] [Domain] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Amount of pre-tax gain (loss) recognized in other comprehensive income | 0 | 0 | 0 |
Aluminum Futures Contracts [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Notional Amount | 25,400 | 8,200 |  |
Amount of pre-tax gain (loss) recognized in other comprehensive income | (1,123) | 1,501 | 394 |
Selling, General and Administrative Expenses [Member] | Flexible Packaging Films [Member] [Domain] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Amount of pre-tax gain (loss) recognized in other comprehensive income | (2,105) |  |  |
Cost of Sales [Member] | Flexible Packaging Films [Member] [Domain] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Amount of pre-tax gain (loss) reclassified from accumulated other comprehensive income to net income (effective portion) | 62 | 62 | 62 |
Cost of Sales [Member] | Aluminum Futures Contracts [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Amount of pre-tax gain (loss) reclassified from accumulated other comprehensive income to net income (effective portion) | 1,069 | $ 1,210 | $ (1,630) |
Jan-19 [Member] | Terphane Ltda [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Notional Amount | $ 2,025 |  |  | R$ 7,380
Foreign Currency Exchange Rate, Translation | 3,644.2 |  |  | 3,644.2
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  | 0.00%
Feb-19 [Member] | Terphane Ltda [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Notional Amount | $ 2,025 |  |  | R$ 7,397
Foreign Currency Exchange Rate, Translation | 3,652.7 |  |  | 3,652.7
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  | 0.00%
Mar-19 [Member] | Terphane Ltda [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Notional Amount | $ 2,025 |  |  | R$ 7,410
Foreign Currency Exchange Rate, Translation | 3,659.3 |  |  | 3,659.3
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  | 0.00%
Apr-19 [Member] | Terphane Ltda [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Notional Amount | $ 2,025 |  |  | R$ 7,430
Foreign Currency Exchange Rate, Translation | 3,669.0 |  |  | 3,669.0
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  | 0.00%
May-19 [Member] | Terphane Ltda [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Notional Amount | $ 2,025 |  |  | R$ 7,451
Foreign Currency Exchange Rate, Translation | 3,679.5 |  |  | 3,679.5
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  | 0.00%
Jun-19 [Member] | Terphane Ltda [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Notional Amount | $ 2,025 |  |  | R$ 7,473
Foreign Currency Exchange Rate, Translation | 3,690.4 |  |  | 3,690.4
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  | 0.00%
Jul-19 [Member] | Terphane Ltda [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Notional Amount | $ 1,800 |  |  | R$ 6,989
Foreign Currency Exchange Rate, Translation | 3,882.6 |  |  | 3,882.6
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  | 0.00%
Aug-19 [Member] | Terphane Ltda [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Notional Amount | $ 1,800 |  |  | R$ 7,011
Foreign Currency Exchange Rate, Translation | 3,895.0 |  |  | 3,895.0
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  | 0.00%
Sep-19 [Member] | Terphane Ltda [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Notional Amount | $ 1,800 |  |  | R$ 7,033
Foreign Currency Exchange Rate, Translation | 3,907.0 |  |  | 3,907.0
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  | 0.00%
Oct-19 [Member] | Terphane Ltda [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Notional Amount | $ 1,800 |  |  | R$ 7,056
Foreign Currency Exchange Rate, Translation | 3,920.3 |  |  | 3,920.3
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  | 0.00%
Nov-19 [Member] | Terphane Ltda [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Notional Amount | $ 1,800 |  |  | R$ 7,080
Foreign Currency Exchange Rate, Translation | 3,933.1 |  |  | 3,933.1
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  | 0.00%
Dec-19 [Member] | Terphane Ltda [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Notional Amount | $ 1,800 |  |  | R$ 7,102
Foreign Currency Exchange Rate, Translation | 3,945.5 |  |  | 3,945.5
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  | 0.00%

X
- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Derivative, Notional Amount, Net + References No definition available. + Details
Name: | tg_DerivativeNotionalAmountNet
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage of Coverage Using Cash Flow Hedges + References No definition available. + Details
Name: | tg_PercentageofCoverageUsingCashFlowHedges
Namespace Prefix: | tg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a),(d)) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
Name: | us-gaap_CostOfGoodsAndServicesSold
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
Name: | us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
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 No definition available. + Details
Name: | us-gaap_DerivativesFairValueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521 + Details
Name: | us-gaap_ForeignCurrencyExchangeRateTranslation1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e637-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109978405&loc=d3e80720-113993 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580 + Details
Name: | us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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

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

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_SellingGeneralAndAdministrativeExpensesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_CostOfSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tg_CashFlowHedgeMaturityDateAxis=tg_Jan19Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tg_CashFlowHedgeMaturityDateAxis=tg_Feb19Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tg_CashFlowHedgeMaturityDateAxis=tg_Mar19Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tg_CashFlowHedgeMaturityDateAxis=tg_Apr19Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tg_CashFlowHedgeMaturityDateAxis=tg_May19Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tg_CashFlowHedgeMaturityDateAxis=tg_Jun19Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tg_CashFlowHedgeMaturityDateAxis=tg_Jul19Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tg_CashFlowHedgeMaturityDateAxis=tg_Aug19Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tg_CashFlowHedgeMaturityDateAxis=tg_Sep19Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tg_CashFlowHedgeMaturityDateAxis=tg_Oct19Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tg_CashFlowHedgeMaturityDateAxis=tg_Nov19Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tg_CashFlowHedgeMaturityDateAxis=tg_Dec19Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |