XML 39 R65.htm IDEA: XBRL DOCUMENT
v3.20.1

Business Segments (Schedule Of Depreciation And Amortization, Capital Expenditures) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |
Depreciation and Amortization | $ 44,284 | $ 33,804 | $ 40,277
Capital Expenditures | 50,864 | 40,814 | 44,362
PE Films [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation and Amortization | 15,822 | 15,513 | 14,609
Capital Expenditures | 23,920 | 21,998 | 15,029
Flexible Packaging Films [Member] [Domain] |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation and Amortization | 1,517 | 1,262 | 10,443
Capital Expenditures | 8,866 | 5,423 | 3,619
Aluminum Extrusions |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation and Amortization | 26,759 | 16,866 | 15,070
Capital Expenditures | 17,855 | 12,966 | 25,653
Subtotal |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation and Amortization | 44,098 | 33,641 | 40,122
Capital Expenditures | 50,641 | 40,387 | 44,301
General Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation and Amortization | 186 | 163 | 155
Capital Expenditures | $ 223 | $ 427 | $ 61

X
- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
Name: | us-gaap_DepreciationDepletionAndAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
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_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=tg_PEFilmsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=tg_AluminumExtrusionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=tg_SubtotalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=tg_GeneralCorporateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |