XML 105 R83.htm IDEA: XBRL DOCUMENT
v3.19.1

Debt And Credit Agreements (Schedule Of Borrowings Under Credit Agreement At Various Indebtedness To Adjusted EBITDA Levels) (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2018
Line of Credit Facility [Line Items] |  |
Credit Spread Over LIBOR | 15000.00% | 150.00%
Indebtedness To Adjusted Ebitda Ratio Greater Than Three Point Five But Less Than Or Equal To Four [Member] |  |
Line of Credit Facility [Line Items] |  |
Credit Spread Over LIBOR |  | 2.50%
Commitment Fee |  | 0.45%
Indebtedness To Adjusted Ebitda Ratio Greater Than Three But Less Than Or Equal To Three Point Five [Member] |  |
Line of Credit Facility [Line Items] |  |
Credit Spread Over LIBOR |  | 2.25%
Commitment Fee |  | 0.40%
Indebtedness-To-Adjusted EBITDA Ratio Greater Than 2.0x But Less Than Or Equal To 3.0x [Member] |  |
Line of Credit Facility [Line Items] |  |
Credit Spread Over LIBOR |  | 2.00%
Commitment Fee |  | 0.35%
Indebtedness-To-Adjusted EBITDA Ratio Greater Than 1.0x But Less Than Or Equal To 2.0x [Member] |  |
Line of Credit Facility [Line Items] |  |
Credit Spread Over LIBOR |  | 1.75%
Commitment Fee |  | 0.30%
Indebtedness-To-Adjusted EBITDA Ratio Less Than Or Equal To 1.0x [Member] |  |
Line of Credit Facility [Line Items] |  |
Indebtedness-to-Adjusted EBITDA Ratio | 1.0 | 1.0
Credit Spread Over LIBOR |  | 1.50%
Commitment Fee |  | 0.25%
Minimum | Indebtedness To Adjusted Ebitda Ratio Greater Than Three Point Five But Less Than Or Equal To Four [Member] |  |
Line of Credit Facility [Line Items] |  |
Indebtedness-to-Adjusted EBITDA Ratio | 3.5 | 3.5
Minimum | Indebtedness To Adjusted Ebitda Ratio Greater Than Three But Less Than Or Equal To Three Point Five [Member] |  |
Line of Credit Facility [Line Items] |  |
Indebtedness-to-Adjusted EBITDA Ratio | 3 | 3
Minimum | Indebtedness-To-Adjusted EBITDA Ratio Greater Than 2.0x But Less Than Or Equal To 3.0x [Member] |  |
Line of Credit Facility [Line Items] |  |
Indebtedness-to-Adjusted EBITDA Ratio | 2.0 | 2.0
Minimum | Indebtedness-To-Adjusted EBITDA Ratio Greater Than 1.0x But Less Than Or Equal To 2.0x [Member] |  |
Line of Credit Facility [Line Items] |  |
Indebtedness-to-Adjusted EBITDA Ratio | 1.0 | 1.0
Maximum | Indebtedness To Adjusted Ebitda Ratio Greater Than Three Point Five But Less Than Or Equal To Four [Member] |  |
Line of Credit Facility [Line Items] |  |
Indebtedness-to-Adjusted EBITDA Ratio | 4 | 4
Maximum | Indebtedness To Adjusted Ebitda Ratio Greater Than Three But Less Than Or Equal To Three Point Five [Member] |  |
Line of Credit Facility [Line Items] |  |
Indebtedness-to-Adjusted EBITDA Ratio | 3.5 | 3.5
Maximum | Indebtedness-To-Adjusted EBITDA Ratio Greater Than 2.0x But Less Than Or Equal To 3.0x [Member] |  |
Line of Credit Facility [Line Items] |  |
Indebtedness-to-Adjusted EBITDA Ratio | 3.0 | 3.0
Maximum | Indebtedness-To-Adjusted EBITDA Ratio Greater Than 1.0x But Less Than Or Equal To 2.0x [Member] |  |
Line of Credit Facility [Line Items] |  |
Indebtedness-to-Adjusted EBITDA Ratio | 2.0 | 2.0

X
- Definition Credit spread over LIBOR basis points. + References No definition available. + Details
Name: | tg_CreditSpreadOverLondonInterbankOfferedRateBasisPoints
Namespace Prefix: | tg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line Of Credit Facility Covenant Terms Debt To Ebitda Ratio + References No definition available. + Details
Name: | tg_LineOfCreditFacilityCovenantTermsDebtToEbitdaRatio
Namespace Prefix: | tg_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
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_LineOfCreditFacilityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LineOfCreditFacilityAxis=tg_IndebtednessToAdjustedEbitdaRatioGreaterThanThreePointFiveButLessThanOrEqualToFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LineOfCreditFacilityAxis=tg_IndebtednessToAdjustedEbitdaRatioGreaterThanThreeButLessThanOrEqualToThreePointFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LineOfCreditFacilityAxis=tg_IndebtednessToAdjustedEbitdaRatioGreaterThanTwoButLessThanOrEqualToThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LineOfCreditFacilityAxis=tg_IndebtednessToAdjustedEbitdaRatioGreaterThanOneButLessThanOrEqualToTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LineOfCreditFacilityAxis=tg_IndebtednessToAdjustedEbitdaRatioLessThanOrEqualToOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |