XML 130 R108.htm IDEA: XBRL DOCUMENT
v3.19.1

Losses Associated With Plant Shutdowns, Asset Impairments And Restructurings, Unusual Items, Gains From Sale Of Assets And Other Items (Details) - USD ($) | 3 Months Ended | 12 Months Ended | 19 Months Ended | 30 Months Ended |
--- | --- | --- | --- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2019 | Dec. 31, 2019 | Dec. 31, 2017 | Dec. 31, 2015
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance and other employee-related costs |  |  |  |  |  |  |  |  |  |  | $ 300,000 |  |  |  |  |  |  |  |  |
Loss on asset impairments |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 223,000 | $ 101,282,000 | $ 1,436,000 |  |  |  |
Severance and other employee-related costs after taxes |  |  |  |  |  |  |  |  |  |  | 200,000 |  |  |  |  |  |  |  |  |
Business Development Expenses |  |  |  |  |  |  |  |  |  |  |  |  | $ 400,000 |  |  |  |  |  |  |
Business Development Expenses net of taxes |  |  |  |  |  |  |  |  |  |  |  |  | 200,000 |  |  |  |  |  |  |
Unrealized gain (loss) on investments under fair value method |  |  |  |  |  |  |  |  |  |  |  |  |  | 30,600,000 | 33,800,000 | 1,600,000 |  |  |  |
Goodwill, Impairment Loss |  |  |  |  |  |  |  |  |  |  |  |  |  | 46,792,000 | 0 | 0 |  |  |  |
Losses Associated with Plant Shutdowns, Asset Impairments, Restructurings & Other |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,500,000 | 94,000,000 | 6,100,000 |  |  |  |
Losses Associated with Plant Shutdowns, Asset Impairments, Restructurings & Other After Taxes |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,900,000 | 79,200,000 | 3,900,000 |  |  |  |
Payments for Restructuring |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,099,000 | 2,198,000 | 1,540,000 |  |  |  |
Restructuring Reserve |  | $ 776,000 |  |  |  | $ 1,103,000 |  |  |  | $ 2,408,000 |  |  |  | 776,000 | 1,103,000 | 2,408,000 |  |  | $ 1,103,000 | $ 1,867,000
kaleo |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized gain (loss) on investments under fair value method | [1] |  |  |  |  |  |  |  |  |  |  |  |  | 30,600,000 | 33,800,000 | 1,600,000 |  |  |  |
Unrealized gain (loss) on investments, net of tax |  |  |  |  |  |  |  |  |  |  |  |  |  | 23,900,000 | 24,000,000 | 1,200,000 |  |  |  |
Harbinger |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized loss on investments under fair value method, other than temporary impairment |  | 200,000 | $ 100,000 | $ 200,000 |  |  |  |  |  |  |  |  |  | 500,000 |  |  |  |  |  |
Unrealized loss on investments under fair value method, other than temporary impairment, after taxes |  | 200,000 | 100,000 | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Alleghany and Bath County, Virginia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized gain (loss) on investments under fair value method |  |  |  |  |  |  |  |  |  | 1,000,000 |  |  |  | (186,000) | 0 | (1,032,000) |  |  |  |
Gain (Loss) on Sale of Properties |  |  | 200,000 |  |  |  |  |  |  |  |  |  |  | 200,000 |  |  |  |  |  |
Gain (Loss) on Disposition of Assets |  |  |  |  |  |  |  |  |  |  |  |  |  | (38,000) | 0 | 0 |  |  |  |
Unrealized Gain (Loss) on Investment Property |  |  |  |  |  |  |  |  |  |  |  |  |  | (186,000) | 0 | (1,032,000) |  |  |  |
Unrealized Gain Loss On Investment Property After Tax |  |  |  |  |  |  |  |  |  | (700,000) |  |  |  |  |  | 700,000 |  |  |  |
Gain (Loss) on Sale of Investment Property, After Tax |  |  | 200,000 |  |  |  |  |  |  |  |  |  |  | 200,000 |  |  |  |  |  |
Aluminum Extrusions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sale of equipment |  |  |  |  |  |  |  |  |  | (200,000) |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Property Plant Equipment, Net of Taxes |  |  |  |  |  |  |  |  |  | (100,000) |  |  |  |  |  |  |  |  |  |
Net Gain on Disposition of Property Plant Equipment net of shutdown loss |  |  |  |  |  |  |  |  |  | 100,000 |  |  |  |  |  |  |  |  |  |
Net Gain on Disposition of Property Plant Equipment net of shutdown loss, Net of Taxes |  |  |  |  |  |  |  |  |  | 100,000 |  |  |  |  |  |  |  |  |  |
Other Restructuring [Member] | FilmProductsManufacturingFacilityInLakeZurichIllinois [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Restructuring Costs |  |  |  |  |  |  |  | $ 200,000 | $ 300,000 | 200,000 | 600,000 | $ 800,000 | 500,000 |  |  | 2,000,000 |  |  |  |
Other Restructuring Costs after Taxes |  |  |  |  |  |  |  |  |  | 100,000 | 400,000 | 500,000 | 300,000 |  |  | 1,300,000 |  |  |  |
Other Plant Consolidation Expenses - Cost of Goods Sold |  |  |  |  |  |  |  | 100,000 | 200,000 | 200,000 | 400,000 | 700,000 | 400,000 |  |  | 1,600,000 |  |  |  |
Other Plant Consolidation Expenses - Cost of Goods Sold, Net of Taxes |  |  |  |  |  |  |  |  |  | 100,000 | 200,000 | 400,000 | 200,000 |  |  | 1,000,000 |  |  |  |
Plant shutdown related expenditures |  |  |  |  |  |  |  |  |  | 800,000 | 1,100,000 | 1,300,000 | 1,100,000 |  | 800,000 | 4,300,000 |  |  | 7,300,000 |
Plant Shutdown Related Expenditures Net, net of taxes |  |  |  |  |  |  | $ 100,000 | 200,000 | 400,000 | 500,000 | 700,000 | 900,000 | 700,000 |  | 500,000 | 2,800,000 |  |  |  |
Severance and other employee-related costs |  |  |  |  |  |  |  | 300,000 | 200,000 | 300,000 | 300,000 | 400,000 | 300,000 |  |  | 1,200,000 |  |  |  |
Loss on asset impairments |  |  |  |  |  |  |  |  |  | 0 | 100,000 | 100,000 | 300,000 |  |  | 400,000 |  |  |  |
Accelerated Depreciation Expense |  |  |  |  |  |  |  | 100,000 | 100,000 | 300,000 | 100,000 | 100,000 | 100,000 |  |  | 600,000 |  |  |  |
Accelerated Depreciation Expense taxes |  |  |  |  |  |  |  |  |  | 200,000 | 100,000 | 100,000 | 100,000 |  |  | 400,000 |  |  |  |
Severance and other employee-related costs after taxes |  |  |  |  |  |  |  | 200,000 |  | 200,000 | 200,000 | 200,000 | 200,000 |  |  | 800,000 |  |  |  |
Plant Shutdown Related Expenditures Gross |  |  |  |  |  |  | 200,000 | 300,000 | 700,000 |  |  |  |  |  |  |  |  |  |  |
Asset impairments after taxes |  |  |  |  |  |  |  |  |  | 0 | 0 | 100,000 | $ 200,000 |  |  | 300,000 |  |  |  |
Other Restructuring [Member] | Film Products Manufacturing Facility in Shanghai, China |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Restructuring Costs |  | 300,000 | 100,000 | 100,000 | $ 0 |  |  |  |  |  |  |  |  | 500,000 |  |  |  |  |  |
Other Restructuring Costs after Taxes |  | 300,000 | 100,000 | 100,000 | 0 |  |  |  |  |  |  |  |  | 500,000 |  |  |  |  |  |
Other Plant Consolidation Expenses - Cost of Goods Sold |  | 300,000 | 700,000 | 200,000 | 0 |  |  |  |  |  |  |  |  | 1,200,000 |  |  |  |  |  |
Other Plant Consolidation Expenses - Cost of Goods Sold, Net of Taxes |  | 300,000 | 700,000 | 200,000 | 0 |  |  |  |  |  |  |  |  | 1,200,000 |  |  |  |  |  |
Plant shutdown related expenditures |  | 900,000 | 1,800,000 | 600,000 | 0 |  |  |  |  |  |  |  |  | 3,300,000 |  |  |  |  |  |
Plant Shutdown Related Expenditures Net, net of taxes |  | 900,000 | 1,800,000 | 600,000 | 0 |  |  |  |  |  |  |  |  | 3,300,000 |  |  |  |  |  |
Severance and other employee-related costs |  | 500,000 | 1,300,000 | 400,000 | 0 |  |  |  |  |  |  |  |  | 2,200,000 |  |  |  |  |  |
Accelerated Depreciation Expense |  | 100,000 | 400,000 | 100,000 | 0 |  |  |  |  |  |  |  |  | 600,000 |  |  |  |  |  |
Accelerated Depreciation Expense taxes |  | 100,000 | 400,000 | 100,000 | 0 |  |  |  |  |  |  |  |  | 600,000 |  |  |  |  |  |
Severance and other employee-related costs after taxes |  | 500,000 | 1,300,000 | 400,000 | 0 |  |  |  |  |  |  |  |  | 2,200,000 |  |  |  |  |  |
Futura Industries [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Business Combination Acquisition, Integration Costs and Other Related Costs |  |  |  |  |  |  |  |  | 3,300,000 |  |  |  |  |  |  |  |  |  |  |
Net Business Combination Acquisition, Integration Costs and Other Related Costs, Net of Taxes |  |  |  |  |  |  |  |  | 2,000,000 |  |  |  |  |  |  |  |  |  |  |
Reversal of Fair Value Inventory Acquisition Write-Up |  |  |  |  |  |  |  |  | 1,700,000 |  |  |  |  |  |  |  |  |  |  |
Acquisition-related expenses |  |  |  |  |  |  |  |  | 1,500,000 |  |  |  |  |  |  |  |  |  |  |
Business Combination, Integration Related Costs |  |  |  |  |  |  |  |  | 100,000 |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Asset |  |  |  |  |  |  |  | 700,000 |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Asset, Net of Taxes |  |  |  |  |  |  |  | (500,000) |  |  |  |  |  |  |  |  |  |  |  |
Personal Care Materials [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, Impairment Loss |  |  |  |  |  |  |  |  |  |  |  |  |  | (46,800,000) | 0 | 0 |  |  |  |
Goodwill, Impairment Loss, Net of Tax |  |  | 38,200,000 |  |  |  |  |  |  |  |  |  |  | 38,200,000 |  |  |  |  |  |
Corporate Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected future environmental costs |  |  |  |  |  | 800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected future environmental costs after taxes |  |  |  |  |  | 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance and other employee-related costs |  |  |  |  |  | 100,000 |  |  | 300,000 |  | 200,000 |  |  |  |  |  |  |  |  |
Severance and other employee-related costs after taxes |  |  |  |  |  | 100,000 |  |  | 200,000 |  | 100,000 |  |  |  |  |  |  |  |  |
Professional Fees |  | 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Professional Fees, net of taxes |  | 400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PE Films [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance and other employee-related costs |  | 300,000 | 300,000 |  | 100,000 | 100,000 | 100,000 |  |  |  | 100,000 |  |  |  |  |  |  |  |  |
Loss on asset impairments |  |  |  |  |  | 0 |  |  |  | 200,000 |  |  |  |  |  |  |  |  |  |
Severance and other employee-related costs after taxes |  | 300,000 | 200,000 |  | 100,000 | 100,000 | 100,000 |  |  |  | 100,000 |  |  |  |  |  |  |  |  |
Professional Fees |  |  | 400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Professional Fees, net of taxes |  |  | 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability |  | 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, Impairment Loss |  |  |  |  |  |  |  |  |  |  |  |  |  | 46,792,000 |  |  |  |  |  |
Loss from Catastrophes |  | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss from Catastrophes net of taxes |  | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Asset, Net of Taxes |  | 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Production LIne Start-up and Ramp-up Costs |  | 300,000 | 200,000 | 600,000 | 1,000,000 | 600,000 | 600,000 | 900,000 | 1,400,000 |  |  |  |  |  |  |  |  |  |  |
Production LIne Start-up and Ramp-up Costs, Net of Taxes |  | 200,000 | 100,000 | $ 500,000 | 900,000 | 600,000 | 500,000 | 800,000 | 1,300,000 |  |  |  |  |  |  |  |  |  |  |
Asset impairments after taxes |  |  |  |  |  | 300,000 |  |  |  | 100,000 |  |  |  |  |  |  |  |  |  |
PE Films [Member] | FilmProductsManufacturingFacilityInLakeZurichIllinois [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments for Restructuring |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,900,000 |  |  |  | 16,000,000 |
Capital Expenditures Restructuring Project |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100,000 |  |  |  | 11,200,000 |
Restructuring Reserve |  |  |  |  |  | 400,000 |  |  |  |  |  |  |  |  | 400,000 |  |  |  | 400,000 |
PE Films [Member] | Personal Care Materials [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, Impairment Loss |  |  | 46,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PE Films [Member] | Other Restructuring [Member] | Film Products Manufacturing Facility in Shanghai, China |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Restructuring Costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,600,000 |  |
Other Plant Consolidation Expenses - Cost of Goods Sold |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500,000 |  |
Severance and other employee-related costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,900,000 |  |
Accelerated Depreciation Expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 600,000 | 900,000 |  |
Restructuring and Disposal Activities - Anticipated Cash Cost Savings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,700,000 |  |
Restructuring, Settlement and Impairment Provisions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,000,000 | $ 7,100,000 |  |
Payments for Restructuring |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,500,000 |  |  |  |  |  |
Asset Impairment And Costs Associated With Exit And Disposal Activities - impairment Line |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,100,000 |  |  |  |  |  |
Asset Impairment And Costs Associated With Exit And Disposal Activities - Cost of Goods Sold |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,200,000 |  |  |  |  |  |
Aluminum Extrusions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Elkhart Plant Roof Damage - SGA |  |  | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Elkhart Plant Roof Damage, net of taxes |  |  | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance and other employee-related costs |  |  |  |  | 100,000 | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance and other employee-related costs after taxes |  |  |  |  | 100,000 | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Development Expenses |  |  |  |  |  |  |  |  |  | 600,000 |  |  |  |  |  |  |  |  |  |
Business Development Expenses net of taxes |  |  |  |  |  |  |  |  |  | 400,000 |  |  |  |  |  |  |  |  |  |
Goodwill, Impairment Loss |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |
Cast House Explosion pretax income/loss |  |  |  |  |  | 5,100,000 |  | 900,000 | 400,000 | 700,000 | (1,700,000) |  |  | 0 | 5,300,000 | 1,900,000 |  |  |  |
Cast House Explosion income/loss net of taxes |  |  |  |  |  | 3,200,000 |  |  |  | 400,000 | (1,100,000) |  |  |  |  |  |  |  |  |
Excess production costs for which recovery from insurance is not assured |  |  |  |  |  |  |  |  |  | 600,000 |  |  |  |  |  |  |  |  |  |
Excess production costs for which recovery from insurance is not assured, net of taxes |  |  |  |  |  |  |  |  |  | 400,000 |  |  |  |  |  |  |  |  |  |
Loss from Catastrophes |  |  |  |  |  | 200,000 |  |  | 100,000 |  | (50,000) | 600,000 |  |  |  |  |  |  |  |
Loss from Catastrophes net of taxes |  |  |  |  |  | 100,000 |  | 600,000 | 200,000 |  | (31,525) | $ 400,000 |  |  |  |  |  |  |  |
Insured Event, Gain (Loss) |  |  |  |  |  | 5,300,000 |  |  | 300,000 | 100,000 | (1,900,000) |  |  |  |  |  |  |  |  |
Insured Event, Gain (Loss), net of taxes |  |  |  |  |  |  |  |  |  | 100,000 | (1,200,000) |  |  |  |  |  |  |  |  |
Tangible Asset Impairment Charges |  |  |  |  |  |  |  |  |  |  | 300,000 |  |  |  |  |  |  |  |  |
Tangible Asset Impairment Charges net of taxes |  |  |  |  |  |  |  |  |  |  | 200,000 |  |  |  |  |  |  |  |  |
Production LIne Start-up and Ramp-up Costs |  |  |  |  |  |  | 100,000 | 100,000 | 300,000 |  |  |  |  |  |  |  |  |  |  |
Production LIne Start-up and Ramp-up Costs, Net of Taxes |  |  |  |  |  |  | 100,000 | 100,000 | 200,000 |  |  |  |  |  |  |  |  |  |  |
Aluminum Extrusions [Member] | Aluminum Extrusions Manufacturing Facility In Carthage Tennessee [Member] [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected future environmental costs |  | 100,000 | 200,000 |  |  | 1,500,000 |  |  | 400,000 |  |  |  |  |  |  |  |  |  |  |
Expected future environmental costs after taxes |  | 100,000 | $ 100,000 |  |  | 1,000,000 |  |  | 200,000 |  |  |  |  |  |  |  |  |  |  |
Business Development Expenses |  | 500,000 |  |  |  | 1,300,000 | 200,000 | 600,000 | 300,000 |  |  |  |  |  |  |  |  |  |  |
Business Development Expenses net of taxes |  | 400,000 |  |  |  | 800,000 | 100,000 | 400,000 | $ 200,000 |  |  |  |  |  |  |  |  |  |  |
Aluminum Extrusions [Member] | Aluminum Extrusions Manufacturing Facility In Newnan Georgia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected future environmental costs |  |  |  |  |  |  |  |  |  | 500,000 |  |  |  |  |  |  |  |  |  |
Expected future environmental costs after taxes |  |  |  |  |  |  |  |  |  | 300,000 |  |  |  |  |  |  |  |  |  |
Aluminum Extrusions [Member] | Facility Closing | Aluminum Extrusions Manufacturing Facility In Kentland, Indiana |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Plant shutdown related expenditures |  |  |  |  |  |  | 200,000 |  |  | 61,000 | 300,000 |  |  |  |  |  |  |  |  |
Plant Shutdown Related Expenditures Net, net of taxes |  |  |  |  |  |  |  |  |  | 39,000 | $ 200,000 |  |  |  |  |  |  |  |  |
Net Gain on Disposition of Property Plant Equipment net of shutdown loss, Net of Taxes |  |  |  |  |  |  | $ 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Flexible packaging films |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on asset impairments |  | 101,000,000 |  |  |  | 101,000,000 |  |  |  |  |  |  |  | 101,000,000 | 101,000,000 |  |  |  |  |
Application of Prior Period Brazilian Value-added Tax Credits |  |  |  |  |  |  |  |  |  | 300,000 |  |  |  |  |  |  |  |  |  |
Application of Prior Period Brazilian Value added Tax Credits after Taxes |  |  |  |  |  |  |  |  |  | 200,000 |  |  |  |  |  |  |  |  |  |
Businesss Combination Settlement of Escrow Account |  |  |  |  |  |  |  | 11,900,000 |  |  |  |  |  | 0 | 11,900,000 | 0 |  |  |  |
Business Combination Settlement of Escrow Account, Net of Taxes |  |  |  |  |  |  |  | $ 11,900,000 |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, Estimate of Possible Loss |  |  |  |  |  | 3,500,000 |  |  |  |  |  |  |  |  | 3,500,000 |  |  |  | 3,500,000 |
Asset impairments after taxes |  |  |  |  |  | 87,000,000 |  |  |  |  |  |  |  | 87,000,000 | 87,000,000 |  |  |  |  |
Assets, Fair Value Disclosure |  | 30,000,000 |  |  |  | 30,000,000 |  |  |  |  |  |  |  | $ 30,000,000 | $ 30,000,000 |  |  |  | $ 30,000,000 |
Business Acquisition, Preacquisition Contingency, Amount of Settlement |  |  |  |  |  |  |  |  |  | 100,000 |  |  |  |  |  | 100,000 |  |  |  |
Business Acquisition, Preacquisition Contingency, Amount of Settlement, Net of Taxes |  |  |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  | $ 0 |  |  |  |
Terphane Ltda [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Professional Fees |  | 100,000 |  |  | 300,000 | 400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Professional Fees, net of taxes |  | $ 100,000 |  |  | $ 200,000 | $ 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | See Notes 1, 3, 4 and 17 for more information on losses associated with plant shutdowns, asset impairments and restructurings, unusual items, gains or losses from sale of assets, gains or losses on an investment accounted for under the fair value method and other items.

X
- Definition Depreciation expense that has been accelerated due to a change in useful life associated with restructuring activities. + References No definition available. + Details
Name: | tg_AcceleratedDepreciationExpense
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Accelerated Depreciation Expense taxes + References No definition available. + Details
Name: | tg_AcceleratedDepreciationExpensetaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Application of Prior Period Brazilian Value-added Tax Credits + References No definition available. + Details
Name: | tg_ApplicationofPriorPeriodBrazilianValueaddedTaxCredits
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | tg_ApplicationofPriorPeriodBrazilianValueaddedTaxCreditsafterTaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Asset Impairment And Costs Associated With Exit And Disposal Activities - Cost of Goods Sold + References No definition available. + Details
Name: | tg_AssetImpairmentAndCostsAssociatedWithExitAndDisposalActivitiesCostofGoodsSold
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amounts charged against earnings for incurred and estimated one-time, nonrecurring costs assoicated with asset impariments and exit and disposal activities. + References No definition available. + Details
Name: | tg_AssetImpairmentAndCostsAssociatedWithExitAndDisposalActivitiesimpairmentLine
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Asset impairment charges after taxes. + References No definition available. + Details
Name: | tg_AssetImpairmentChargesAfterTaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Acquisition, Preacquisition Contingency, Amount of Settlement, Net of Taxes + References No definition available. + Details
Name: | tg_BusinessAcquisitionPreacquisitionContingencyAmountofSettlementNetofTaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Asset, Net of Taxes + References No definition available. + Details
Name: | tg_BusinessCombinationContingentConsiderationArrangementsChangeinAmountofContingentConsiderationAssetNetofTaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination Settlement of Escrow Account, Net of Taxes + References No definition available. + Details
Name: | tg_BusinessCombinationSettlementofEscrowAccountNetofTaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Non-recurring expenses associated with business development projects + References No definition available. + Details
Name: | tg_BusinessDevelopmentExpenses
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Development Expenses net of taxes + References No definition available. + Details
Name: | tg_BusinessDevelopmentExpensesnetoftaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Businesss Combination Settlement of Escrow Account + References No definition available. + Details
Name: | tg_BusinesssCombinationSettlementofEscrowAccount
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Capital expenditures incurred as part of a restructuring project + References No definition available. + Details
Name: | tg_CapitalExpendituresRestructuringProject
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Cast House Explosion income/loss net of taxes + References No definition available. + Details
Name: | tg_CastHouseExplosionincomelossnetoftaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Cast House Explosion pretax income/loss + References No definition available. + Details
Name: | tg_CastHouseExplosionpretaxincomeloss
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Cost-Method Investments, Other Than Temporary Impairment Net Of Tax + References No definition available. + Details
Name: | tg_CostMethodInvestmentsOtherThanTemporaryImpairmentNetOfTax
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Elkhart Plant Roof Damage - SGA + References No definition available. + Details
Name: | tg_ElkhartPlantRoofDamageSGA
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Elkhart Plant Roof Damage, net of taxes + References No definition available. + Details
Name: | tg_ElkhartPlantRoofDamagenetoftaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Expected future environmental costs after taxes. + References No definition available. + Details
Name: | tg_EnvironmentalExitCostsAnticipatedCostAfterTaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Excess production costs for which recovery from insurance is not assured + References No definition available. + Details
Name: | tg_Excessproductioncostsforwhichrecoveryfrominsuranceisnotassured
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Excess production costs for which recovery from insurance is not assured, net of taxes + References No definition available. + Details
Name: | tg_Excessproductioncostsforwhichrecoveryfrominsuranceisnotassurednetoftaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Gain (Loss) on Disposition of Property Plant Equipment, Net of Taxes + References No definition available. + Details
Name: | tg_GainLossonDispositionofPropertyPlantEquipmentNetofTaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Gain (Loss) on Sale of Investment Property, After Tax + References No definition available. + Details
Name: | tg_GainLossonSaleofInvestmentPropertyAfterTax
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Insured Event, Gain (Loss), net of taxes + References No definition available. + Details
Name: | tg_InsuredEventGainLossnetoftaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Losses associated with plant shutdowns asset impairments restructurings unusual items gains losses from sale of assets other items. + References No definition available. + Details
Name: | tg_LossesAssociatedWithPlantShutdownsAssetImpairmentsRestructuringsUnusualItemsGainsLossesFromSaleOfAssetsOtherItems
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Losses associated with plant shutdowns asset impairments restructurings unusual items gains losses from sale of assets other items after tax. + References No definition available. + Details
Name: | tg_LossesAssociatedWithPlantShutdownsAssetImpairmentsRestructuringsUnusualItemsGainsLossesFromSaleOfAssetsOtherItemsAfterTax
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Loss from Catastrophes net of taxes + References No definition available. + Details
Name: | tg_LossfromCatastrophesnetoftaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Net Business Combination Acquisition, Integration Costs and Other Related Costs + References No definition available. + Details
Name: | tg_NetBusinessCombinationAcquisitionIntegrationCostsandOtherRelatedCosts
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Net Business Combination Acquisition, Integration Costs and Other Related Costs, Net of Taxes + References No definition available. + Details
Name: | tg_NetBusinessCombinationAcquisitionIntegrationCostsandOtherRelatedCostsNetofTaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Net Gain on Disposition of Property Plant Equipment net of shutdown loss + References No definition available. + Details
Name: | tg_NetGainonDispositionofPropertyPlantEquipmentnetofshutdownloss
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Net Gain on Disposition of Property Plant Equipment net of shutdown loss, Net of Taxes + References No definition available. + Details
Name: | tg_NetGainonDispositionofPropertyPlantEquipmentnetofshutdownlossNetofTaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Other costs associated with plant consolidation project included in "Cost of goods sold" + References No definition available. + Details
Name: | tg_OtherPlantConsolidationExpensesCostofGoodsSold
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Other Plant Consolidation Expenses - Cost of Goods Sold, Net of Taxes + References No definition available. + Details
Name: | tg_OtherPlantConsolidationExpensesCostofGoodsSoldNetofTaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Other Restructuring Costs after Taxes + References No definition available. + Details
Name: | tg_OtherRestructuringCostsafterTaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Plant Shutdown Related Expenditures Gross + References No definition available. + Details
Name: | tg_PlantShutdownRelatedExpendituresGross
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Net incremental expenses that are not considered part of ongoing operations associated with plant shutdown. + References No definition available. + Details
Name: | tg_PlantShutdownRelatedExpendituresNet
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Plant Shutdown Related Expenditures Net, net of taxes + References No definition available. + Details
Name: | tg_PlantShutdownRelatedExpendituresNetnetoftaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Production LIne Start-up and Ramp-up Costs + References No definition available. + Details
Name: | tg_ProductionLIneStartupandRampupCosts
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Production LIne Start-up and Ramp-up Costs, Net of Taxes + References No definition available. + Details
Name: | tg_ProductionLIneStartupandRampupCostsNetofTaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Professional Fees, net of taxes + References No definition available. + Details
Name: | tg_ProfessionalFeesnetoftaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Restructuring and Disposal Activities - Anticipated Cash Cost Savings + References No definition available. + Details
Name: | tg_RestructuringandDisposalActivitiesAnticipatedCashCostSavings
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Reversal of Fair Value Inventory Acquisition Write-Up + References No definition available. + Details
Name: | tg_ReversalofFairValueInventoryAcquisitionWriteUp
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Severance Costs After Taxes + References No definition available. + Details
Name: | tg_SeveranceCostsAfterTaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Tangible Asset Impairment Charges net of taxes + References No definition available. + Details
Name: | tg_TangibleAssetImpairmentChargesnetoftaxes
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Unrealized Gain Loss On Investment Property After Tax + References No definition available. + Details
Name: | tg_UnrealizedGainLossOnInvestmentPropertyAfterTax
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Unrealized Gain Loss On Investments Net Of Tax. + References No definition available. + Details
Name: | tg_UnrealizedGainLossOnInvestmentsNetOfTax
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Unrealized Gain (Loss) on Investment Property + References No definition available. + Details
Name: | tg_UnrealizedGainLossonInvestmentProperty
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: 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=109223946&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228 + Details
Name: | us-gaap_AssetImpairmentCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount paid or received to resolve the preacquisition contingency. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 2.A.6) -URI http://asc.fasb.org/extlink&oid=27011391&loc=d3e105049-122735 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessAcquisitionPreacquisitionContingencyAmountOfSettlement
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460 + Details
Name: | us-gaap_BusinessCombinationAcquisitionRelatedCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of increase (decrease) in the value of right to a contingent consideration asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationAsset1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs. + References No definition available. + Details
Name: | us-gaap_BusinessCombinationIntegrationRelatedCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the cost method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. + References No definition available. + Details
Name: | us-gaap_CostmethodInvestmentsOtherThanTemporaryImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total anticipated costs associated with remediation, site restoration, postclosure, monitoring commitments, or other exit costs that may occur on the sale, disposal, or abandonment of a particular property resulting from unanticipated contamination of the assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.Y.Q4) -URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 + Details
Name: | us-gaap_EnvironmentalExitCostsAnticipatedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
Name: | us-gaap_GainLossOnDispositionOfAssets1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228 + Details
Name: | us-gaap_GainLossOnSaleOfProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: 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=109223946&loc=d3e3602-108585 + Details
Name: | us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267 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=109223946&loc=d3e3602-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13777-109266 + Details
Name: | us-gaap_GoodwillImpairmentLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount after tax of loss recognized that results from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References No definition available. + Details
Name: | us-gaap_GoodwillImpairmentLossNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of excess (deficiency) of insurance recovery over the loss incurred from an insured event. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6397426&loc=d3e17499-108355 + Details
Name: | us-gaap_InsuredEventGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Reflects the estimated amount of loss from the specified contingency as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=115931803&loc=d3e12021-110248 + Details
Name: | us-gaap_LossContingencyEstimateOfPossibleLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The charge against earnings in the period for the uninsured portion of a loss from a fire, explosion, or natural disaster (hurricane, earthquake). + 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 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
Name: | us-gaap_LossFromCatastrophes
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of other expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: 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=109223946&loc=d3e3602-108585 + Details
Name: | us-gaap_OtherRestructuringCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 17 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3367-108585 + Details
Name: | us-gaap_PaymentsForRestructuring
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07.2(a),(b),(c),(d)) -URI http://asc.fasb.org/extlink&oid=114873854&loc=SL114874292-224272 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 220 -Section 45 -Paragraph 3 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=114873831&loc=SL114874205-224268 + Details
Name: | us-gaap_ProfessionalFees
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_RestructuringCostAndReserveLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
Name: | us-gaap_RestructuringReserve
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of restructuring charges, remediation cost, and asset impairment loss. + 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 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
Name: | us-gaap_RestructuringSettlementAndImpairmentProvisions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: 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=109223946&loc=d3e3602-108585 + Details
Name: | us-gaap_SeveranceCosts1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760 + Details
Name: | us-gaap_TangibleAssetImpairmentCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of investments, not including unrealized gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, held at each balance sheet date and included in earnings for the period. + References Reference 1: 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=109223946&loc=d3e3602-108585 + Details
Name: | us-gaap_UnrealizedGainLossOnInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=tg_KaleoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=tg_HarbingerCapitalPartnersSpecialSituationsFundLPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_EntityByLocationAxis=tg_AlleghanyandBathCountyVirginiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=us-gaap_OtherRestructuringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_EntityByLocationAxis=tg_FilmProductsManufacturingFacilityInLakeZurichIllinoisMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_EntityByLocationAxis=tg_FilmProductsManufacturingFacilityInShanghaiChinaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=tg_FuturaIndustriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

X
- Details
Name: | dei_EntityByLocationAxis=tg_PersonalCareMaterialsMember
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: | dei_EntityByLocationAxis=tg_AluminumExtrusionsManufacturingFacilityInCarthageTennesseeMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_EntityByLocationAxis=tg_AluminumExtrusionsManufacturingFacilityInNewnanGeorgiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=us-gaap_FacilityClosingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_EntityByLocationAxis=tg_AluminumExtrusionsManufacturingFacilityInKentlandIndianaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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