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Consolidated Statements Of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Retained Earnings	Trust for Savings Restoration Plan	Foreign Currency Translation	Gain (Loss) on Derivative Financial Instruments	Pension & Other Post-retirement Benefit Adjust.
Beginning Balance at Dec. 31, 2014	$ 372,029us-gaap_StockholdersEquity	$ 24,364us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	$ 499,300us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	$ (1,440)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = tg_TrustForSavingRestorationPlanMember	$ (47,270)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedTranslationAdjustmentMember	$ 656us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember	$ (103,581)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	9,870us-gaap_NetIncomeLoss		9,870us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Foreign currency translation adjustment (net of tax benefit of $1,609)	(34,653)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax				(34,653)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedTranslationAdjustmentMember
Derivative financial instruments adjustment (net of tax benefit of $399)	(662)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax					(662)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
Amortization of prior service costs and net gains or losses (net of tax of $1,462)	2,522us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax						2,522us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
Cash dividends declared ($0.09 per share)	(2,939)us-gaap_DividendsCommonStockCash		(2,939)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Stock-based compensation expense	900tg_ShareBasedCompensationExpenseValue	900tg_ShareBasedCompensationExpenseValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Issued upon exercise of stock options & other	1,800tg_StockIssuedDuringPeriodForStockOptionsExercisedAndOtherMiscellaneousStockTransactions	1,800tg_StockIssuedDuringPeriodForStockOptionsExercisedAndOtherMiscellaneousStockTransactions / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Tredegar common stock purchased by trust for savings restoration plan			6tg_TredegarCommonStockPurchasedByTrustForSavingsRestorationPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	(6)tg_TredegarCommonStockPurchasedByTrustForSavingsRestorationPlan / us-gaap_StatementEquityComponentsAxis = tg_TrustForSavingRestorationPlanMember
Ending Balance at Mar. 31, 2015	$ 348,867us-gaap_StockholdersEquity	$ 27,064us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	$ 506,237us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	$ (1,446)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = tg_TrustForSavingRestorationPlanMember	$ (81,923)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedTranslationAdjustmentMember	$ (6)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember	$ (101,059)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, stock options, restricted stock or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Tredegar Common Stock Purchased By Trust For Savings Restoration Plan

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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-Number 210

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax and reclassification adjustments, 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).

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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