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Plants Shutdowns, Asset Impairments, Restructurings And Other (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended | 24 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016 | Jun. 30, 2017
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Payments to Acquire Property, Plant, and Equipment |  |  | $ 26,692 | $ 19,018 |  |
Production LIne Start-up and Ramp-up Costs | $ 1,000 |  | 2,800 |  |  |
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest | 47,031 | $ 4,725 | 53,152 | 15,223 |  |
Business Development Expenses | 600 |  | 900 | 400 |  |
Pretax charges for severance and other employee-related costs |  |  | 300 |  |  |
(Gain)/loss on asset impairments and divestitures |  |  | 50 | 339 |  |
Other Non-Operating and Non-Recurring Charges [Abstract] |  |  |  |  |  |
Unrealized gain (loss) on investment under fair value method |  |  | 24,800 | 1,100 |  |
Gain (Loss) on Disposition of Assets |  |  | 307 | 0 |  |
Payments for Restructuring |  |  | 558 |  |  |
kaleo |  |  |  |  |  |
Other Non-Operating and Non-Recurring Charges [Abstract] |  |  |  |  |  |
Unrealized gain (loss) on investment under fair value method | 21,500 | 300 | 24,800 | 1,100 |  |
Unrealized gain (loss) on investment under fair value method, after taxes | 15,700 | 200 | $ 18,200 | 800 |  |
Fair Value Inputs, Discount Rate |  |  | 45.00% |  | 45.00% |
Futura Industries [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Net Business Combination Acquisition, Integration Costs and Other Related Costs |  |  | $ 3,300 |  |  |
Business Combination, Inventory FV Adj |  |  | 1,700 |  |  |
Business Combination, Acquisition Related Costs |  |  | 1,500 |  |  |
Business Combination, Integration Related Costs |  |  | 100 |  |  |
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Asset | (700) |  | (700) |  |  |
Futura Industries [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Payments to Acquire Property, Plant, and Equipment | 500 |  | 900 |  |  |
Flexible Packaging Films [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Businesss Combination Settlement of Escrow Account | (11,900) |  |  |  |  |
Loss Contingency, Estimate of Possible Loss | 3,500 |  | 3,500 |  |  | $ 3,500
Foreign Income Tax Expense (Benefit), Continuing Operations | 400 |  |  |  |  |
PE Films |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Production LIne Start-up and Ramp-up Costs | 900 |  | 2,400 |  |  |
Aluminum Extrusions |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Production LIne Start-up and Ramp-up Costs | 100 |  | 400 |  |  |
Cast House Explosion pretax income | 900 | (600) | 500 | (600) |  |
Excess production costs for which recovery from insurance is not assured | 300 |  |  |  | $ 600 |
Insured Event, Gain (Loss) |  |  | 600 |  |  |
Loss from Catastrophes |  |  | 100 |  |  |
Severance |  |  |  |  |  |
Other Non-Operating and Non-Recurring Charges [Abstract] |  |  |  |  |  |
Payments for Restructuring |  |  | 482 |  |  |
Aluminum Extrusions Manufacturing Facility In Newnan Georgia [Member] | Aluminum Extrusions |  |  |  |  |  |
Other Non-Operating and Non-Recurring Charges [Abstract] |  |  |  |  |  |
Environmental Exit Costs, Anticipated Cost |  |  | 300 |  |  |
FilmProductsManufacturingFacilityInLakeZurichIllinois [Member] | PE Films |  |  |  |  |  |
Other Non-Operating and Non-Recurring Charges [Abstract] |  |  |  |  |  |
Payments for Restructuring |  |  | 500 |  |  | 14,400
Capital Expenditures Restructuring Project |  |  | 100 |  |  | 11,200
FilmProductsManufacturingFacilityInLakeZurichIllinois [Member] | Other Restructuring [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Plant Shutdown Related Expenditures Gross | 300 |  | 700 |  |  |
Plant shutdown related expenditures |  | 1,400 | 600 | 2,500 |  | 7,100
Pretax charges for severance and other employee-related costs | 300 | 400 | 100 | 700 |  |
(Gain)/loss on asset impairments and divestitures |  | 100 | 100 | 300 |  |
Accelerated Depreciation Expense | 100 | 100 | 200 | 200 |  |
Other Restructuring Costs | 200 | 800 | 400 | 1,300 |  |
Other Plant Consolidation Expenses - Cost of Goods Sold |  | $ 700 | 300 | $ 1,100 |  |
FilmProductsManufacturingFacilityInLakeZurichIllinois [Member] | RestructuringSeverance&EquipmentTransfers [Member] | PE Films |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
RestructuringExpectedCashOutflows | 5,000 |  | 5,000 |  |  | 5,000
FilmProductsManufacturingFacilityInLakeZurichIllinois [Member] | RestructuringCapExEquiptUpgrades [Member] | PE Films |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
RestructuringExpectedCashOutflows | 11,000 |  | 11,000 |  |  | 11,000
FilmProductsManufacturingFacilityInLakeZurichIllinois [Member] | RestructuringSafetyQualityIncentives [Member] | PE Films |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
RestructuringExpectedCashOutflows | 1,000 |  | 1,000 |  |  | 1,000
FilmProductsManufacturingFacilityInLakeZurichIllinois [Member] | RestructuringProductQualifications [Member] | PE Films |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
RestructuringExpectedCashOutflows | 1,000 |  | 1,000 |  |  | 1,000
Minimum | FilmProductsManufacturingFacilityInLakeZurichIllinois [Member] | PE Films |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Related Cost, Expected Cost | 5,000 |  | 5,000 |  |  | 5,000
RestructuringExpectedCashOutflows | 17,000 |  | 17,000 |  |  | 17,000
Minimum | FilmProductsManufacturingFacilityInLakeZurichIllinois [Member] | Severance | PE Films |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Related Cost, Expected Cost | 2,000 |  | 2,000 |  |  | 2,000
Maximum | FilmProductsManufacturingFacilityInLakeZurichIllinois [Member] | PE Films |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Related Cost, Expected Cost | 6,000 |  | 6,000 |  |  | 6,000
RestructuringExpectedCashOutflows | 17,000 |  | 17,000 |  |  | 17,000
Maximum | FilmProductsManufacturingFacilityInLakeZurichIllinois [Member] | Severance | PE Films |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Related Cost, Expected Cost | $ 3,000 |  | 3,000 |  |  | $ 3,000
Pension Plan [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Defined Benefit Plan Estimated Required Future Employer Contributions In Current Fiscal Year |  |  | $ 6,000 |  |  |

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