Tredegar (TG) 10-Q1 May 182018 Q1 Quarterly reportFinancial data

Company Profile

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
Document And Entity Information - shares	Mar. 31, 2018	Apr. 26, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	TREDEGAR CORP
Entity Central Index Key	850,429
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus (Q1,Q2,Q3,FY)	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		33,120,303

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 36,135	$ 36,491
Accounts and other receivables, net of allowance for doubtful accounts and sales returns of $3,109 in 2018 and $3,304 in 2017	130,551	120,135
Income Taxes Receivable, Current	25,754	32,080
Inventories	85,358	86,907
Prepaid expenses and other	7,694	8,224
Total current assets	285,492	283,837
Property, plant and equipment, at cost	780,566	770,892
Less accumulated depreciation	(558,803)	(547,801)
Net property, plant and equipment	221,763	223,091
Investment in kaleo	62,200	54,000
Intangible Assets, Net (Excluding Goodwill)	39,515	40,552
Goodwill	128,219	128,208
Deferred Tax Assets, Net, Noncurrent	9,087	16,636
Other assets	9,334	9,419
Total assets	755,610	755,743
Current liabilities:
Accounts payable	106,524	108,391
Accrued expenses	39,821	42,433
Total current liabilities	146,345	150,824
Long-term debt	141,000	152,000
Liability, Pension and Other Postretirement and Postemployment Benefits, Noncurrent	96,855	98,837
Deferred income tax liabilities	0	2,123
Other noncurrent liabilities	8,511	8,179
Total liabilities	392,711	411,963
Commitments and contingencies (Notes 1 and 13)
Shareholders’ equity:
Common stock, no par value (issued and outstanding - 33,120,303 at March 31, 2018 and 33,017,422 at December 31, 2017)	35,112	34,747
Common stock held in trust for savings restoration plan (71,710 shares at March 31, 2018 and 71,309 shares at December 31, 2017)	(1,536)	(1,528)
Foreign currency translation adjustment	(84,272)	(86,178)
Gain on derivative financial instruments	174	459
Pension and other post-retirement benefit adjustments	(88,338)	(90,950)
Retained earnings	501,759	487,230
Total shareholders’ equity	362,899	343,780
Total liabilities and shareholders’ equity	$ 755,610	$ 755,743

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Accounts and other receivables, allowance for doubtful accounts and sales returns	$ 3,109	$ 3,304
Common stock, no par value
Common stock, shares issued	33,120,303	33,017,422
Common stock, shares outstanding	33,120,303	33,017,422
Common Stock, Shares Held in Employee Trust, Shares	71,710	71,309

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues and other items:
Sales	$ 258,711	$ 221,026
Other income (expense), net	33	(14)
Other Nonoperating Income (Expense), Net - Other	8,233	3,286
Total revenues, net of other expenses	266,944	224,312
Costs and expenses:
Cost of goods sold	203,189	179,761
Freight	8,790	8,306
Selling, general and administrative	21,829	19,949
Research and development	4,311	4,558
Amortization of identifiable intangibles	1,029	1,241
Accrued pension and post-retirement benefits	2,578	2,632
Interest expense	1,644	1,180
Asset impairments and costs associated with exit and disposal activities, net of adjustments	123	564
Total	243,493	218,191
Income before income taxes	23,451	6,121
Income taxes from continuing operations	5,287	2,418
Net income	$ 18,164	$ 3,703
Basic
Basic	$ 0.55	$ 0.11
Diluted
Diluted	$ 0.55	$ 0.11
Shares used to compute earnings per share:
Basic	32,982	32,920
Diluted	32,988	32,957
Dividends per share	$ 0.11	$ 0.11

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	$ 0	$ 57
Net income	18,164	3,703
Other comprehensive income (loss):
Foreign currency translation adjustment	1,906	4,632
Derivative financial instruments adjustment	(285)	374
Amortization of prior service costs and net gains or losses	2,612	1,950
Other comprehensive income (loss)	4,233	6,956
Comprehensive income (loss)	22,397	10,659
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	(144)	224
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax	$ 762	$ 1,111

Consolidated Statements Of Com6

Consolidated Statements Of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustment, tax (benefit)	$ 0	$ 57
Derivative financial instruments adjustment, tax (benefit)	(144)	224
Amortization of prior service costs and net gains or losses, tax	$ 762	$ 1,111

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 18,164	$ 3,703
Adjustments for noncash items:
Depreciation	7,490	7,721
Amortization of identifiable intangibles	1,029	1,241
Payment for Pension and Other Postretirement Benefits	(1,187)	(917)
Deferred income taxes	4,834	(1,665)
Accrued pension and post-retirement benefits	2,578	2,632
(Gain)/loss on investment in kaléo accounted for under the fair value method	(8,200)	(3,300)
(Gain)/loss on asset impairments and divestitures	0	50
Gain (Loss) on Disposition of Assets	0	(164)
Changes in assets and liabilities, net of effects of acquisitions and divestitures:
Accounts and other receivables	(14,412)	(11,942)
Inventories	1,846	535
Income taxes recoverable/payable	6,344	2,887
Prepaid expenses and other	748	305
Accounts payable and accrued expenses	(4,785)	1,652
Other, net	560	553
Net cash provided by operating activities	15,009	3,619
Cash flows from investing activities:
Capital expenditures	(5,062)	(12,718)
Acquisition, net of cash acquired	0	(87,038)
Payment for Contingent Consideration Liability, Investing Activities	4,250
Escrow Deposit Disbursements Related to Property Acquisition		0
Proceeds from the sale of assets and other	0	31
Net cash used in investing activities	(812)	(99,725)
Cash flows from financing activities:
Borrowings	24,000	122,000
Debt principal payments	(35,000)	(24,000)
Dividends paid	(3,643)	(3,635)
Proceeds from exercise of stock options and other	(247)	695
Net cash provided by (used in) financing activities	(14,890)	95,060
Effect of exchange rate changes on cash	337	399
Increase (decrease) in cash and cash equivalents	(356)	(647)
Cash and cash equivalents at beginning of period	36,491	29,511
Cash and cash equivalents at end of period	$ 36,135	$ 28,864

Consolidated Statements Of Shar

Consolidated Statements Of Shareholders' Equity - 3 months ended Mar. 31, 2018 - USD ($) $ in Thousands	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, 2017	$ 343,780	$ 34,747	$ 487,230	$ (1,528)	$ (86,178)	$ 459	$ (90,950)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	18,164		18,164
Foreign currency translation adjustment (net of tax of $0)	1,906				1,906
Derivative financial instruments adjustment (net of tax benefit of $144)	(285)					(285)
Amortization of prior service costs and net gains or losses (net of tax of $762)	2,612						2,612
Cash dividends declared ($0.11 per share)	(3,643)		(3,643)
Stock-based compensation expense	612	612
Issued upon exercise of stock options & other	(247)	(247)
Tredegar common stock purchased by trust for savings restoration plan			8	(8)
Ending Balance at Mar. 31, 2018	$ 362,899	$ 35,112	$ 501,759	$ (1,536)	$ (84,272)	$ 174	$ (88,338)

Consolidated Statements Of Sha9

Consolidated Statements Of Shareholders' Equity (Parenthetical) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)$ / shares
Statement of Stockholders' Equity [Abstract]
Foreign currency translation adjustment, tax (benefit)	$ 0
Derivative financial instruments adjustment, tax (benefit)	(144)
Amortization of prior service costs and net gains or losses, tax	$ 762
Cash dividends declared, per share \| $ / shares	$ 0.11

Basis Of Presentation

Basis Of Presentation	3 Months Ended
Basis Of Presentation	Mar. 31, 2018
Basis Of Presentation [Abstract]
Basis Of Presentation	In the opinion of management, the accompanying consolidated financial statements of Tredegar Corporation and its subsidiaries (“Tredegar,” “the Company,” “we,” “us” or “our”) contain all adjustments necessary to state fairly, in all material respects, Tredegar’s consolidated financial position as of March 31, 2018 , the consolidated results of operations for the three months ended March 31, 2018 and 2017 , the consolidated cash flows for the three months ended March 31, 2018 and 2017 , and the consolidated changes in shareholders’ equity for the three months ended March 31, 2018 . All such adjustments, unless otherwise detailed in the notes to the consolidated interim financial statements, are deemed to be of a normal, recurring nature. The Company operates on a calendar fiscal year except for the Aluminum Extrusions segment, which operates on a 52/53-week fiscal year basis. As such, the fiscal first quarter for 2018 and 2017 for this segment references 13-week periods ended March 25, 2018 and March 26, 2017, respectively. The Company does not believe the impact of reporting the results of this segment as stated above is material to the consolidated financial results. The financial position data as of December 31, 2017 that is included herein was derived from the audited consolidated financial statements provided in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 (“ 2017 Form 10-K”) but does not include all disclosures required by United States generally accepted accounting principles (“GAAP”). These financial statements should be read in conjunction with the consolidated financial statements and related notes included in the 2017 Form 10-K. The results of operations for the three months ended March 31, 2018 , are not necessarily indicative of the results to be expected for the full year. Certain prior year balances have been reclassified to conform with current year presentation (see Note 14 for additional detail). Revenue Recognition. Revenue from the sale of products, which is shown net of estimated sales returns and allowances, is recognized at a point in time when control has passed to the customer. Control passes to the customer generally when the customer takes physical possession or when title passes if defined separately in the sales agreement. Amounts billed to customers related to freight are classified as sales in the accompanying consolidated statements of income. The cost of freight is classified as a separate line in the accompanying consolidated statements of income. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction between Tredegar and its customers (such as value-added taxes) are accounted for on a net basis and therefore excluded from revenues. See Note 11 for disaggregation of revenue by segment and type. As of March 31, 2018 and December 31, 2017, Accounts receivable and other receivables, net, were $130.6 million and $120.1 million , respectively, made up of the following: March 31, December 31, (In thousands) 2018 2017 Customer receivables $ 129,056 $ 113,556 Other accounts and notes receivable 4,604 9,883 Total accounts and other receivables 133,660 123,439 Less: Allowance for bad debts and sales returns (3,109 ) (3,304 ) Total accounts and other receivables, net $ 130,551 $ 120,135 For the three months ended March 31, 2018, the Company had no material bad-debt expense and there were no material contract assets, contract liabilities or deferred contract costs recorded on the Consolidated Balance Sheet as of March 31, 2018. Payment terms start from the date of satisfaction of the performance obligation and vary from COD (cash on delivery) to up to 120 days. The Company’s contracts generally include one performance obligation, which is satisfied at a point in time. For the three months ended March 31, 2018, revenue recognized from performance obligations related to prior periods (for example, changes in transaction price), was not material. Revenue expected to be recognized in any future period related to remaining performance obligations, excluding i) revenue pertaining to contracts that have an original expected duration of one year or less, ii) contracts where revenue is recognized as invoiced and iii) variable consideration related to unsatisfied performance obligations, is not expected to materially impact the Company’s financial results.

Acquisitions

Acquisitions	3 Months Ended
Acquisitions	Mar. 31, 2018
Business Combinations [Abstract]
Acquisitions	On February 15, 2017, Bonnell Aluminum acquired 100% of the stock of Futura Industries Corporation (“Futura”) on a net debt-free basis for approximately $92 million . The amount actually funded in cash at the transaction date was approximately $87 million , which was net of preliminary closing adjustments for working capital and seller transaction-related obligations assumed and subsequently paid by Bonnell Aluminum. In addition, the Company was refunded $5 million in the first quarter of 2018 since Futura did not meet certain performance requirements for the 2017 fiscal year (“Earnout Provision”). The acquisition, which was funded using Tredegar’s existing revolving credit facility, was treated as an asset purchase for U.S. federal income tax purposes. The net purchase price for financial reporting purposes was set at approximately $82.9 million , which includes adjustments for the fair value of the Earnout Provision of $4.3 million and the net settlement of certain post-closing adjustments of $0.1 million . Adjustments to the purchase price were made retrospectively as if the accounting had been completed on the acquisition date. Based upon management’s valuation of the fair value of tangible and intangible assets acquired (net of cash acquired) and liabilities assumed, the allocation of the purchase price was as follows: (in Thousands) Accounts receivable $ 6,680 Inventories 10,342 Prepaid expenses and other current assets 240 Property, plant & equipment 32,662 Identifiable intangible assets: Customer relationships 24,000 Trade names 6,700 Trade payables & accrued expenses (8,135 ) Total identifiable net assets 72,489 Adjusted Net Purchase Price 82,860 Goodwill $ 10,371 The goodwill and other intangible asset balances associated with this acquisition are deductible for U.S. federal income tax purposes on a straight-line basis over a period of approximately 15 years. For financial reporting purposes, customer relationships are being amortized over 12 years and trade names are being amortized over 13 years. Goodwill is not subject to amortization for financial reporting purposes.

Plants Shutdowns, Asset Impairm

Plants Shutdowns, Asset Impairments, Restructurings And Other	3 Months Ended
	Mar. 31, 2018
Restructuring Charges [Abstract]
Plant Shutdowns, Asset Impairments, Restructurings And Other	Plant shutdowns, asset impairments, restructurings and other items are shown in the net sales and operating profit by segment table in Note 10 and are also included in “Asset impairments and costs associated with exit and disposal activities, net of adjustments” in the consolidated statements of income, unless otherwise noted below. Plant shutdowns, asset impairments, restructurings and other items in the first three months of 2018 include: • Pretax charges of $1.0 million related to estimated excess costs associated with the ramp-up of new product offerings and additional expenses related to strategic capacity expansion projects by PE Films (included in “Cost of goods sold” in the consolidated statements of income); • Pretax charges of $0.3 million for professional fees associated with the Terphane Limitada worthless stock deduction, the impairment of assets of Flexible Packaging Films and determining the effect of the new U.S. federal income tax law (included in “Selling, general and administrative expenses” in the consolidated statements of income); and • Pretax charges of $0.1 million for severance and other employee-related costs associated with restructurings in PE Films and Aluminum Extrusions. Plant shutdowns, asset impairments, restructurings and other items in the first three months of 2017 include: • Pretax charges of $3.3 million related to the acquisition of Futura, i) associated with accounting adjustments of $1.7 million made to the value of inventory sold by Aluminum Extrusions after its acquisition of Futura (included in “Cost of goods sold” in the consolidated statements of income), ii) acquisition costs of $1.5 million and, iii) integration costs of $0.1 million (included in “Selling, general and administrative expenses” in the consolidated statements of income); • Pretax charges of $1.7 million related to estimated excess costs associated with the ramp-up of new product offerings and additional expenses related to strategic capacity expansion projects by PE Films of $1.4 million and by Aluminum Extrusions of $0.3 million (included in “Cost of goods sold” in the consolidated statements of income); • Pretax charges of $0.4 million related to the explosion that occurred in the second quarter of 2016 at the aluminum extrusions manufacturing facility in Newnan, Georgia, which includes excess production costs of $0.3 million (included in “Cost of goods sold” in the consolidated statements of income) for which recovery from insurance carriers was not assured, and legal and consulting fees of $0.1 million (included in “Selling, general and administrative expenses” in the consolidated statements of income); • Pretax charges of $0.7 million associated with the consolidation of domestic PE Films’ manufacturing facilities, which consists of severance and other employee-related costs of $0.2 million asset impairments of $0.1 million , accelerated depreciation of $0.1 million (included in “Cost of goods sold” in the consolidated statements of income) and other facility consolidation-related expenses of $0.3 million ($ 0.2 million included in “Cost of goods sold” in the consolidated statements of income); • Pretax charges of $0.3 million related to expected future environmental costs at the aluminum extrusions manufacturing facility in Carthage, Tennessee (included in “Cost of goods sold” in the consolidated statements of income); • Pretax charges of $0.3 million associated with a business development project (included in “Selling, general and administrative expense” in the consolidated statements of income and “Corporate expenses, net” in the net sales and operating profit by segment table); and • Pretax charges of $0.3 million for severance and other employee-related costs associated with restructurings in Corporate (included in “Corporate expenses, net” in the net sales and operating profit by segment table). Results in the first three months of 2018 and 2017 includes unrealized gains of $8.2 million ( $6.4 million after taxes) and $3.3 million ( $2.5 million after taxes), respectively, on the Company’s investment in kaleo, Inc. (“kaléo”), which is accounted for under the fair value method (included in “Other income (expense), net” in the consolidated statements of income). See Note 7 for additional information on investments. A reconciliation of the beginning and ending balances of accrued expenses associated with exit and disposal activities and charges associated with asset impairments and reported as “Asset impairments and costs associated with exit and disposal activities, net of adjustments” in the consolidated statements of income for the three months ended March 31, 2018 is as follows: (In thousands) Severance (a) Asset Impairments Other (b) Total Balance at January 1, 2018 $ 627 $ — $ 476 $ 1,103 Changes in 2018: Charges 123 — — 123 Cash spent (464 ) — (234 ) (698 ) Charges against assets — — — — Balance at March 31, 2018 $ 286 $ — $ 242 $ 528 (a) Severance Cash spent includes severance payments associated with the consolidation of North American PE Films manufacturing facilities. (b) Other primarily includes other restructuring costs associated with Aluminum Extrusions.

Inventories

Inventories	3 Months Ended
Inventories	Mar. 31, 2018
Inventory, Net [Abstract]
Inventories	The components of inventories are as follows: March 31, December 31, (In thousands) 2018 2017 Finished goods $ 24,154 $ 20,281 Work-in-process 10,615 11,958 Raw materials 31,089 35,909 Stores, supplies and other 19,500 18,759 Total $ 85,358 $ 86,907

Earnings Per Share

Earnings Per Share	3 Months Ended
Earnings Per Share	Mar. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Share	Basic earnings per share is computed by dividing net income by the weighted average number of shares of common stock outstanding. Diluted earnings per share is computed by dividing net income by the weighted average common and potentially dilutive common equivalent shares outstanding, determined as follows: Three Months Ended March 31, (In thousands) 2018 2017 Weighted average shares outstanding used to compute basic earnings per share 32,982 32,920 Incremental dilutive shares attributable to stock options and restricted stock 6 37 Shares used to compute diluted earnings per share 32,988 32,957 Incremental shares attributable to stock options and restricted stock are computed under the treasury stock method using the average market price during the related period.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	3 Months Ended
Accumulated Other Comprehensive Income (Loss)	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Comprehensive Income (Loss) Note [Text Block]	The following table summarizes the after-tax changes in accumulated other comprehensive income (loss) for the three months ended March 31, 2018 : (In thousands) Foreign currency translation adjustment Gain (loss) on derivative financial instruments Pension and other post-retirement benefit adjustments Total Beginning balance, January 1, 2018 $ (86,178 ) $ 459 $ (90,950 ) $ (176,669 ) Other comprehensive income (loss) before reclassifications 1,906 (132 ) — 1,774 Amounts reclassified from accumulated other comprehensive income (loss) — (153 ) 2,612 2,459 Net other comprehensive income (loss) - current period 1,906 (285 ) 2,612 4,233 Ending balance, March 31, 2018 $ (84,272 ) $ 174 $ (88,338 ) $ (172,436 ) The following table summarizes the after-tax changes in accumulated other comprehensive income (loss) for the three months ended March 31, 2017 : (In Thousands) Foreign Gain (loss) on Pension and Total Beginning balance, January 1, 2017 $ (93,970 ) $ 863 $ (90,127 ) $ (183,234 ) Other comprehensive income (loss) before reclassifications 4,632 528 — 5,160 Amounts reclassified from accumulated other comprehensive income (loss) — (154 ) 1,950 1,796 Net other comprehensive income (loss) - current period 4,632 374 1,950 6,956 Ending balance, March 31, 2017 $ (89,338 ) $ 1,237 $ (88,177 ) $ (176,278 ) Reclassifications of balances out of accumulated other comprehensive income (loss) into net income for the three months ended March 31, 2018 are summarized as follows: (In thousands) Amount Location of gain Gain (loss) on derivative financial instruments: Aluminum future contracts, before taxes $ 232 Cost of sales Foreign currency forward contracts, before taxes (41 ) Selling, general & administrative Foreign currency forward contracts, before taxes 15 Cost of sales Total, before taxes 206 Income tax expense (benefit) 53 Income taxes Total, net of tax $ 153 Amortization of pension and other post-retirement benefits: Actuarial gain (loss) and prior service costs, before taxes $ (3,374 ) (a) Income tax expense (benefit) (762 ) Income taxes Total, net of tax $ (2,612 ) (a) This component of accumulated other comprehensive income (loss) is included in the computation of net periodic pension cost (see Note 9 for additional detail). Reclassifications of balances out of accumulated other comprehensive income (loss) into net income for the three months ended March 31, 2017 are summarized as follows: (In thousands) Amount Location of gain Gain (loss) on derivative financial instruments: Aluminum future contracts, before taxes $ 233 Cost of sales Foreign currency forward contracts, before taxes 15 Cost of sales Total, before taxes 248 Income tax expense (benefit) 94 Income taxes Total, net of tax $ 154 Amortization of pension and other post-retirement benefits: Actuarial gain (loss) and prior service costs, before taxes $ (3,061 ) (a) Income tax expense (benefit) (1,111 ) Income taxes Total, net of tax $ (1,950 ) (a) This component of accumulated other comprehensive income (loss) is included in the computation of net periodic pension cost (see Note 9 for additional detail).
Cost of goods sold	The following table summarizes the after-tax changes in accumulated other comprehensive income (loss) for the three months ended March 31, 2018 : (In thousands) Foreign currency translation adjustment Gain (loss) on derivative financial instruments Pension and other post-retirement benefit adjustments Total Beginning balance, January 1, 2018 $ (86,178 ) $ 459 $ (90,950 ) $ (176,669 ) Other comprehensive income (loss) before reclassifications 1,906 (132 ) — 1,774 Amounts reclassified from accumulated other comprehensive income (loss) — (153 ) 2,612 2,459 Net other comprehensive income (loss) - current period 1,906 (285 ) 2,612 4,233 Ending balance, March 31, 2018 $ (84,272 ) $ 174 $ (88,338 ) $ (172,436 ) The following table summarizes the after-tax changes in accumulated other comprehensive income (loss) for the three months ended March 31, 2017 : (In Thousands) Foreign Gain (loss) on Pension and Total Beginning balance, January 1, 2017 $ (93,970 ) $ 863 $ (90,127 ) $ (183,234 ) Other comprehensive income (loss) before reclassifications 4,632 528 — 5,160 Amounts reclassified from accumulated other comprehensive income (loss) — (154 ) 1,950 1,796 Net other comprehensive income (loss) - current period 4,632 374 1,950 6,956 Ending balance, March 31, 2017 $ (89,338 ) $ 1,237 $ (88,177 ) $ (176,278 )

Investments

Investments	3 Months Ended
Investments	Mar. 31, 2018
Equity Method Investments and Joint Ventures [Abstract]
Investments	In August 2007 and December 2008, the Company made an aggregate investment of $7.5 million in kaléo, a privately held specialty pharmaceutical company dedicated to building innovative solutions for serious and life-threatening medical conditions. The mission of kaléo is to provide products that empower patients to confidently take control of their medical conditions. Tredegar owns Series A-3 Preferred Stock and Series B Preferred Stock in kaléo that, taken together, represents on a fully-diluted basis an approximate 20% interest in kaléo. Tredegar accounts for its investment in kaléo under the fair value method. At the time of the initial investment, the Company elected the fair value option of accounting since its investment objectives were similar to those of venture capitalists, which typically do not have controlling financial interests. At March 31, 2018, December 31, 2017, March 31, 2017 and December 31, 2016, the estimated fair value of the Company’s investment (also the carrying value, which is separately stated in the consolidated balance sheets) was $62.2 million , $54.0 million , $23.5 million , and $20.2 million , respectively. The Company recognized unrealized gains of $8.2 million ( $6.4 million after taxes) and $3.3 million ( $2.5 million after taxes) in the first quarters of 2018 and 2017 , respectively. The change in the estimated fair value of the Company’s holding in kaléo since the end of 2017 primarily relates to the difference from discounting between the present value of projected cash flows at March 31, 2018 versus December 31, 2017 (i.e., the time value of money), changes in cash flow projections for various scenarios and the assessment of the risk-adjusted discount rate appropriate for the various scenarios. Kaléo’s stock is not publicly traded. The valuation estimate in this situation is based on projection assumptions or Level 3 inputs that have a wide range of possible outcomes. There are numerous assumptions and Level 3 inputs that, if changed, impact the projection of kaléo’s future cash flows, and the probability of actually achieving those cash flows. Moreover, many of the assumptions and inputs are interrelated, including key assumptions for kaléo’s projected market share, pricing and net margins after chargebacks, discounts, rebates, copays and returns. Accordingly, determining the sensitivity of changes in estimated fair value to the change in one assumption is not practical. Ultimately, the true value of the Company’s ownership interest in kaléo will be determined if and when a liquidity event occurs, and the ultimate value could be materially different from the $62.2 million estimated fair value reflected in the Company’s financial statements at March 31, 2018 . Unrealized gains (losses) associated with this investment are included in “Other income (expense), net” in the consolidated statements of income and separately stated in the segment operating profit table in Note 11. Subsequent to its most recent investment (December 15, 2008), and until the next round of financing, the Company believes fair value estimates are based upon Level 3 inputs since there is no secondary market for its ownership interest. Accordingly, until the next round of financing or any other significant financial transaction, value estimates will primarily be based on assumptions related to meeting cash flow projections and discounting of these factors for their high degree of risk. If kaléo does not meet its projected cash flows or related risks are unfavorable versus the most recent valuation, or a new round of financing or other significant financial transaction indicates a lower enterprise value, then the Company’s estimate of the fair value of its ownership interest in kaléo is likely to decline. Adjustments to the estimated fair value of this investment will be made in the period upon which such changes can be quantified. The Company’s investment in the Harbinger Capital Partners Special Situations Fund, L.P. (“Harbinger Fund”) had a carrying value (included in “Other assets and deferred charges”) of $1.7 million at March 31, 2018 and December 31, 2017 . The carrying value at March 31, 2018 reflected Tredegar’s cost basis in its investment in the Harbinger Fund, net of total withdrawal proceeds received and unrealized losses. No withdrawal proceeds were received in the first three months of 2017 or 2018. The timing and amount of future installments of withdrawal proceeds, which commenced in August 2010, were not known as of March 31, 2018 . Gains on the Company’s investment in the Harbinger Fund will be recognized when the amounts expected to be collected from any withdrawal from the investment are known, which will likely be when cash in excess of the remaining carrying value is received. Losses will be recognized when management believes it is probable that future withdrawal proceeds will not exceed the remaining carrying value.

Derivative Financial Instrument

Derivative Financial Instruments	3 Months Ended
Derivative Financial Instruments	Mar. 31, 2018
Summary of Derivative Instruments [Abstract]
Derivative Financial Instruments	Tredegar uses derivative financial instruments for the purpose of hedging margin exposure from fixed-price forward sales contracts in Aluminum Extrusions and exposure from currency volatility that exist as part of ongoing business operations (primarily in Flexible Packaging Films). These derivative financial instruments are designated as and qualify as cash flow hedges and are recognized in the consolidated balance sheet at fair value. The fair value of derivative instruments recorded on the consolidated balance sheets are based upon Level 2 inputs. If individual derivative instruments with the same counterparty can be settled on a net basis, the Company records the corresponding derivative fair values as a net asset or net liability. In the normal course of business, Aluminum Extrusions enters into fixed-price forward sales contracts with certain customers for the future sale of fixed quantities of aluminum extrusions at scheduled intervals. In order to hedge margin exposure created from the fixing of future sales prices relative to volatile raw material (aluminum) costs, Aluminum Extrusions enters into a combination of forward purchase commitments and futures contracts to acquire or hedge aluminum, based on the scheduled purchases for the firm sales commitments. The fixed-price firm sales commitments and related hedging instruments generally have durations of not more than 12 months, and the notional amount of aluminum futures contracts that hedged future purchases of aluminum to meet fixed-price forward sales contract obligations was $17.7 million ( 18.2 million pounds of aluminum) at March 31, 2018 and $8.2 million ( 8.0 million pounds of aluminum) at December 31, 2017 . The table below summarizes the location and gross amounts of aluminum futures contract fair values (Level 2) in the consolidated balance sheets as of March 31, 2018 and December 31, 2017 : March 31, 2018 December 31, 2017 (In thousands) Balance Sheet Account Fair Value Balance Sheet Account Fair Value Derivatives Designated as Hedging Instruments Asset derivatives: Accrued Expenses $ 491 Prepaid expenses and other $ 578 Liability derivatives: Accrued Expenses $ (553 ) Prepaid expenses and other $ (16 ) Net asset (liability) $ (62 ) $ 562 In the event that a counterparty to an aluminum fixed-price forward sales contract chooses not to take delivery of its aluminum extrusions, the customer is contractually obligated to compensate Aluminum Extrusions for any losses on the related aluminum futures and/or forward contracts through the date of cancellation. The table below summarizes the location and gross amounts of foreign currency forward contract fair values (Level 2) in the consolidated balance sheets as of March 31, 2018 and December 31, 2017 : March 31, 2018 December 31, 2017 (In Thousands) Balance Sheet Fair Balance Sheet Fair Derivatives Designated as Hedging Instruments Asset derivatives: Accrued Expenses $ — Accrued Expenses $ — Liability derivatives: Accrued Expenses (330 ) Accrued Expenses (558 ) Net asset (liability) (330 ) $ (558 ) The Company's earnings are exposed to foreign currency exchange risk primarily through the translation of the financial statements of subsidiaries that have a functional currency other than the U.S. Dollar. On September 29, 2017, the Flexible Packaging Films business unit in Brazil (“Terphane Ltda.”) entered into 15 monthly foreign exchange average forward rate contracts to purchase Brazilian Real (“R$”) and sell U.S. Dollars covering the period from October 2017 through December 2018. On January 29, 2018, Terphane Ltda. entered into an additional 6 monthly foreign exchange average forward rate contracts to purchase Brazilian Real and sell U.S. Dollars covering the period from January 2019 through June 2019. All of these foreign currency exchange contracts have been designated and qualify as cash flow hedges of Terphane Ltda.'s forecasted sales to customers quoted or priced in U.S. Dollars over that period. By changing the currency risk associated with these U.S. Dollar sales, the derivatives have the effect of offsetting operating costs quoted or priced in Brazilian Real and decreasing the net exposure to Brazilian Real in the consolidated statements of income. The aggregate notional amount of open foreign exchange contracts at March 31, 2018 was $15.0 million ( R$48.5 million ). These derivative contracts involve elements of market risk that are not reflected on the consolidated balance sheet, including the risk of dealing with counterparties and their ability to meet the terms of the contracts. The counterparties to any forward purchase commitments are major aluminum brokers and suppliers, and the counterparties to any aluminum futures contracts are major financial institutions. Fixed-price forward sales contracts are only made available to the best and most credit-worthy customers. The counterparties to the Company’s foreign currency cash flow hedge contracts are major financial institutions. The pretax effect on net income (loss) and other comprehensive income (loss) of derivative instruments classified as cash flow hedges and described in the previous paragraphs for the three month periods ended March 31, 2018 and 2017 is summarized in the table below: (In thousands) Cash Flow Derivative Hedges Three Months Ended March 31, Aluminum Futures Contracts Foreign Currency Forwards 2018 2017 2018 2018 2017 Amount of pre-tax gain (loss) recognized in other comprehensive income (loss) $ (392 ) $ 846 $ — $ 170 $ — Location of gain (loss) reclassified from accumulated other comprehensive income (loss) into net income (loss) (effective portion) Cost of Cost of Cost of Selling, general & admin Cost of Amount of pre-tax gain (loss) reclassified from accumulated other comprehensive income (loss) to net income (loss) (effective portion) $ 232 $ 233 $ 15 $ (41 ) $ 15 As of March 31, 2018 , the Company expects $0.1 million of unrealized after-tax gains on derivative instruments reported in accumulated other comprehensive income (loss) to be reclassified to earnings within the next 12 months. For the three month periods ended March 31, 2018 and 2017 , net gains or losses realized, from previously unrealized net gains or losses on hedges that had been discontinued, were not material. The table below summarizes the location and gross amounts of foreign currency forward contract fair values (Level 2) in the consolidated balance sheets as of March 31, 2018 and December 31, 2017 : March 31, 2018 December 31, 2017 (In Thousands) Balance Sheet Fair Balance Sheet Fair Derivatives Designated as Hedging Instruments Asset derivatives: Accrued Expenses $ — Accrued Expenses $ — Liability derivatives: Accrued Expenses (330 ) Accrued Expenses (558 ) Net asset (liability) (330 ) $ (558 )

Pension And Other Post-Retireme

Pension And Other Post-Retirement Benefits	3 Months Ended
Pension And Other Post-Retirement Benefits	Mar. 31, 2018
Retirement Benefits [Abstract]
Pension And Other Post-Retirement Benefits	The Company sponsors noncontributory defined benefit (pension) plans covering certain current and former employees. The plan for salaried and hourly employees currently in effect is based on a formula using the participant’s years of service and compensation or using the participant’s years of service and a dollar amount. The plan was closed to new participants and pay for active plan participants for benefit calculations was frozen as of December 31, 2007. As of January 31, 2018, the plan no longer accrued benefits associated with crediting employees for service, thereby freezing future benefits under the plan. The components of net periodic benefit cost for the pension and other post-retirement benefit programs reflected in the consolidated statements of income are shown below: Pension Benefits Other Post-Retirement Benefits Three Months Ended March 31, Three Months Ended March 31, (In thousands) 2018 2017 2018 2017 Service cost $ 5 $ 58 $ 10 $ 9 Interest cost 2,882 3,164 69 76 Expected return on plan assets (3,761 ) (3,736 ) — — Amortization of prior service costs, (gains) losses and net transition asset 3,428 3,123 (54 ) (61 ) Net periodic benefit cost $ 2,554 $ 2,609 $ 25 $ 24 Pension and other post-retirement liabilities were $97.5 million and $99.5 million at March 31, 2018 and December 31, 2017 , respectively ( $0.6 million included in “Accrued expenses” at March 31, 2018 and December 31, 2017 , with the remainder included in “Pension and other postretirement benefit obligations, net” in the consolidated balance sheets). The Company’s required contributions are expected to be approximately $8.4 million in 2018 . Contributions to the pension plan during the first three months of 2018 were $1.2 million . Tredegar funds its other post-retirement benefits (life insurance and health benefits) on a claims-made basis, which the Company anticipates will be consistent with amounts paid for the year ended December 31, 2017 , or $0.3 million .

Segment Reporting

Segment Reporting	3 Months Ended
Segment Reporting	Mar. 31, 2018
Segment Reporting [Abstract]
Segment Reporting	The Company’s business segments are PE Films, Flexible Packaging Films and Aluminum Extrusions. Information by business segment is reported below. There are no accounting transactions between segments and no allocations to segments. Net sales (sales less freight) and operating profit from ongoing operations are the measures of sales and operating profit used by the chief operating decision maker for purposes of assessing performance. The following table presents net sales and operating profit by segment for the three -month periods ended March 31, 2018 and 2017 : Three Months Ended March 31, (In thousands) 2018 2017 Net Sales PE Films $ 93,249 $ 86,411 Flexible Packaging Films 28,437 26,710 Aluminum Extrusions 128,235 99,599 Total net sales 249,921 212,720 Add back freight 8,790 8,306 Sales as shown in the Consolidated Statements of Income $ 258,711 $ 221,026 Operating Profit (Loss) PE Films: Ongoing operations $ 14,034 $ 9,031 Plant shutdowns, asset impairments, restructurings and other (1,052 ) (2,068 ) Flexible Packaging Films: Ongoing operations 1,715 (1,998 ) Plant shutdowns, asset impairments, restructurings and other — — Aluminum Extrusions: Ongoing operations 10,199 9,829 Plant shutdowns, asset impairments, restructurings and other (53 ) (4,341 ) Total 24,843 10,453 Interest income 56 74 Interest expense 1,644 1,180 Gain (loss) on investment in kaléo accounted for under fair value method 8,200 3,300 Stock option-based compensation costs 86 3 Corporate expenses, net 7,918 6,523 Income before income taxes 23,451 6,121 Income taxes 5,287 2,418 Net income $ 18,164 $ 3,703 The following table presents identifiable assets by segment at March 31, 2018 and December 31, 2017 : (In thousands) March 31, 2018 December 31, 2017 PE Films $ 293,662 $ 289,514 Flexible Packaging Films 47,810 49,915 Aluminum Extrusions 272,609 268,127 Subtotal 614,081 607,556 General corporate 105,394 111,696 Cash and cash equivalents 36,135 36,491 Total $ 755,610 $ 755,743 The following tables disaggregate the Company’s revenue by geographic area and product group for the three months ended March 31, 2018 and 2017: Net Sales by Geographic Area (b) Three Months Ended March 31, (In thousands) 2018 2017 (c) United States $ 159,562 $ 129,901 Exports from the United States to: Asia 23,592 18,722 Canada 13,298 13,092 Europe 1,822 2,358 Latin America 3,052 3,730 Operations outside the United States: Brazil 23,151 21,360 The Netherlands 11,928 12,760 Hungary 8,818 5,191 China 2,274 3,405 India 2,424 2,201 Total (a) $ 249,921 $ 212,720 Net Sales by Product Group Three Months Ended March 31, (In thousands) 2018 2017 (c) PE Films: Personal care materials $ 61,644 $ 61,299 Surface protection films 29,815 23,441 LED lighting products & other films 1,790 1,672 Subtotal 93,249 86,412 Flexible Packaging Films 28,437 26,710 Aluminum Extrusions: Nonresidential building & construction 65,280 52,210 Consumer durables 15,189 12,097 Distribution 10,971 6,334 Automotive 9,673 10,174 Residential building & construction 9,601 7,272 Machinery & equipment 9,094 7,205 Electrical 8,427 4,306 Subtotal 128,235 99,598 Total $ 249,921 $ 212,720 See a reconciliation of net sales to sales as shown in the Condensed Consolidated Statements of Income on the previous page. (a) The difference between total consolidated sales as reported in the consolidated statements of income and segment, geographic and product group net sales reported in this note is freight of $8.8 million and $8.3 million in the three months ended March 31, 2018 and 2017, respectively. (b) Export sales relate almost entirely to PE Films. Operations outside the U.S. in The Netherlands, Hungary, China and India also relate to PE Films. Operations in Brazil are primarily related to Flexible Packaging Films, but also include PE Films operations. Sales from locations in The Netherlands and Hungary are primarily to customers located in Europe. Sales from locations in China (Guangzhou and Shanghai) are primarily to customers located in China, but also include other customers in Asia. (c) As disclosed in Note 1, prior period amounts have not been adjusted under the modified retrospective method.

Income Taxes

Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	The Tax Cuts and Jobs Act (the “TCJA”) makes broad and complex changes to the U.S. tax code, including but not limited to: (i) reducing the U.S. federal corporate tax rate from 35 percent to 21 percent ; (ii) requiring companies to pay a one-time transition tax on certain unrepatriated earnings of foreign subsidiaries; (iii) generally eliminating U.S. federal income taxes on dividends from foreign subsidiaries; (iv) creating new taxes on certain foreign earnings; (v) eliminating certain deductions; and (vi) providing the option to full expensing of qualified property. The SEC staff issued Staff Accounting Bulletin No. 118 (“SAB 118”), which provides guidance on accounting for the tax effects of the TCJA. SAB 118 provides a measurement period that should not extend beyond one year from the TCJA enactment date for companies to complete the accounting under Accounting Standards Codification No. 740 (“ASC 740”). In accordance with SAB 118, a company must reflect the income tax effects of a company’s accounting for those tax effects of the TCJA for which the accounting under ASC 740 is complete. To the extent that a company’s accounting for certain tax effects of the TCJA is incomplete but it is able to determine a reasonable estimate, it must record a provisional estimate in the financial statements. If a company cannot determine a reasonable estimate to be included in the financial statements, it should continue to apply ASC 740 on the basis of the provisions of the tax law that were in effect immediately before the enactment of the TCJA. The TCJA is complex and its impact may materially differ from the Company’s estimates due to, among other things, changes in the Company’s assumptions, implementation guidance that may be issued from the IRS and related interpretations and clarifications of the tax law relevant for the completion of the Company’s 2017 tax return filings. The Company expects to complete its assessment of these items during 2018, and any adjustments to the provisional amounts initially recorded will be included as an adjustment to income tax expense or benefit in the period the amounts are determined in accordance with SAB 118. While item (ii) above has not been completed, the Company has not accrued any deemed repatriation taxes on unrepatriated earnings of its foreign subsidiaries, since its preliminary assessments indicates that such foreign subsidiaries have no net cumulative unremitted earnings due to historical repatriation. There has been no change to this estimate in the first quarter of 2018. The remaining TCJA summary items (i and iii through vi above) have been reflected in the Company’s 2018 effective tax rate based on the Company’s best estimates as indicated in the rate reconciliation table. The application of the new Global Intangible Low Taxed Income (“GILTI”) tax rules to the Company, which is part of item (iv) above is not complete. The rules are complex, and under GAAP, the Company is allowed to make a policy choice of either (a) treating taxes due on future U.S. inclusions in taxable income related to GILTI as current period expense when incurred (the “period cost method”) or (b) factoring such amounts into a company’s measurement of its deferred income taxes (“deferred method”). The selection of an accounting policy with respect to the new GILTI tax rules will depend, in part, on the Company’s analysis of its global income to determine whether it expects to have future U.S. inclusions in taxable income related to GILTI and, if so, what the impact is expected to be. Accordingly, the Company has not made a policy decision regarding whether to record deferred income taxes on GILTI. Tredegar recorded tax expense of $5.3 million on pretax net income of $23.5 million in the first three months of 2018 . Therefore, the effective tax rate in the first three months of 2018 was 22.5% , compared to 39.5% in the first three months of 2017 . The quarterly effective tax rate is an estimate based on a proration of the components of the Company’s estimated annual effective tax rate. The significant differences between the U.S. federal statutory rate and the effective income tax rate for the three months ended March 31, 2018 and 2017 are as follows: (In thousands, except percentages) 2018 2017 Three Months Ended March 31, Amount % Amount % Income tax expense at federal statutory rate $ 4,925 21.0 $ 2,142 35.0 Foreign rate differences 578 2.4 362 5.9 State taxes, net of federal income tax benefit 321 1.4 254 4.2 Stock-based compensation 173 0.7 159 2.6 Non-deductible expenses 84 0.4 118 1.9 Global Intangible Low Tax Income (GILTI) 32 0.1 — — Tax contingency accruals and tax settlements — — 72 1.2 Changes in estimates related to prior year tax provision — — (38 ) (0.7 ) Unremitted earnings from foreign operations — — (67 ) (1.1 ) Domestic production activities deduction — — (171 ) (2.8 ) Increase in value of kaleo investment held abroad — — (406 ) (6.6 ) Research and development tax credit (100 ) (0.4 ) (147 ) (2.4 ) Foreign Derived Intangible Income (FDII) (153 ) (0.7 ) — — Foreign tax incentives (211 ) (0.9 ) — — Valuation allowance due to foreign losses and impairments (362 ) (1.5 ) 140 2.3 Effective income tax rate $ 5,287 22.5 $ 2,418 39.5 Tredegar accrues U.S. federal income taxes on unremitted earnings of all foreign subsidiaries where required. However, due to changes in the taxation of dividends under TCJA, Tredegar will only record U.S. federal income taxes on unremitted earnings of its foreign subsidiaries where Tredegar cannot take steps to eliminate any potential tax on future distributions from its foreign subsidiaries. The Brazilian federal statutory income tax rate is a composite of 34.0% ( 25.0% of income tax and 9.0% of social contribution on income). Terphane Ltda.’s manufacturing facility in Brazil is the beneficiary of certain income tax incentives that allow for a reduction in the statutory Brazilian federal income tax rate to 15.25% levied on the operating profit on certain of its products. The incentives have been granted for a 10 -year period, which has a commencement date of January 1, 2015. The benefit from the tax incentives was $0.2 million in the first three months of 2018 (none in 2017 ). Tredegar and its subsidiaries file income tax returns in the U.S., various states and jurisdictions outside the U.S. With exceptions for some U.S. states and non-U.S. jurisdictions, Tredegar and its subsidiaries are no longer subject to U.S. federal, state or non-U.S. income tax examinations by tax authorities for years before 2014.

Contingencies

Contingencies	3 Months Ended
Contingencies	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Contingencies	In 2011, Tredegar was notified by U.S. Customs and Border Protection (“U.S. Customs”) that certain film products exported by Terphane Ltda. to the U.S. since November 6, 2008 could be subject to duties associated with an antidumping duty order on imported PET films from Brazil. The Company contested the applicability of these antidumping duties to the films exported by Terphane Ltda., and it filed a request with the U.S. Department of Commerce (“Commerce”) for clarification about whether the film products at issue are within the scope of the antidumping duty order. On January 8, 2013, Commerce issued a scope ruling confirming that the films are not subject to the order, provided that Terphane Ltda. can establish to the satisfaction of U.S. Customs that the performance enhancing layer on those films is greater than 0.00001 inches thick. The films at issue are manufactured to specifications that exceed that threshold. On February 6, 2013, certain U.S. producers of PET film filed a summons with the U.S. Court of International Trade to appeal the scope ruling from Commerce. In December 2014, the U.S. International Trade Commission voted to revoke the anti-dumping duty order on imported PET films from Brazil. The revocation, as a result of the vote by the U.S. International Trade Commission, was effective as of November 2013. On February 20, 2015, certain U.S. producers of PET films filed a summons with the U.S. Court of International Trade to appeal the determination by the U.S. International Trade Commission. The Court granted a motion by the plaintiffs to stay the appeal of the revocation decision pending the resolution of the scope appeal. On June 8, 2017, the U.S. Court of International Trade remanded the scope determination to Commerce for re-consideration of certain scope issues. On October 20, 2017, Commerce filed its Remand Redetermination Results with the U.S. Court of International Trade, and again found that Terphane Ltda.’s films are outside of the scope of the antidumping duty order. Commerce’s decision will now be reviewed by the U.S. Court of International Trade.

New Accounting Pronouncements

New Accounting Pronouncements	3 Months Ended
New Accounting Pronouncements	Mar. 31, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
New Accounting Pronouncements	In May 2014, the Financial Accounting Standards Board (“FASB”) and International Accounting Standards Board (“IASB”) issued their converged standard on revenue recognition. The revised revenue standard contains principles that an entity will apply to direct the measurement of revenue and timing of when it is recognized. The core principle of the guidance is that the recognition of revenue should depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which an entity expects to be entitled in exchange for those goods and services. To achieve that core principle, an entity will utilize a principle-based five-step approach model. The converged standard also includes more robust disclosure requirements which will require entities to provide sufficient information to enable users of financial statements to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. In March 2016, amended guidance was issued regarding clarifying the implementation guidance on principal versus agent considerations and in April 2016, clarifying guidance was issued relating to identifying performance obligations and licensing implementation. The Company adopted the new standard effective January 1, 2018, using the modified retrospective approach applied to all contracts as of the date of adoption. Comparative periods have not been adjusted and continue to be reported under the accounting standards in effect for those periods. The adoption of ASU 2014-09, as amended, had no material impact on the Company’s consolidated financial position, results of operations, equity or cash flows as of the adoption date or for the three months ended March 31, 2018. The Company has included the disclosures required by ASU 2014-09. In January 2016, the FASB issued amended guidance associated with accounting for equity investments measured at fair value. The amended guidance requires all equity investments to be measured at fair value with changes in the fair value recognized through net income (other than those accounted for under equity method of accounting or those that result in consolidation of the investee or those without a readily determinable fair value). The amended guidance also requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. In addition, the amendments in this update eliminate the requirement to disclose the fair value of financial instruments measured at amortized cost for entities that are not public business entities and the requirement to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet for public business entities. The Company adopted this amended guidance in the first quarter of 2018 and the adoption did not have a material impact on the Company’s consolidated financial statements. In February 2016, the FASB issued a revised standard on lease accounting. Lessees will need to recognize virtually all of their leases on the balance sheet, by recording a right-of-use asset and lease liability. The revised standard requires additional analysis of the components of a transaction to determine if a right-of-use asset is embedded in the transaction that needs to be treated as a lease. Substantial additional disclosures are also required by the revised standard. The revised standard is effective for fiscal years beginning after December 31, 2018, including the interim periods within those fiscal years. The revised standard should be adopted using a modified retrospective approach, with early adoption permitted. The Company has a process in place to analyze the impact of the standard, and the related guidance issued, on all leases throughout the Company. This process includes reviewing all active leases with terms greater than 12 months, which are currently being identified. The Company has also started evaluating the new requirements for tracking and cost recovery of these leases. The Company expects to complete its evaluations of the impacts of the accounting and disclosure requirements on its business processes, controls and systems by the second half of 2018. In October 2016, the FASB issued guidance that requires an entity to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The amendments are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, and should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings at the beginning of the period of adoption. The Company adopted this guidance in the first quarter of 2018 and the adoption did not have a material impact on the Company’s consolidated financial statements. In January 2017, the FASB issued guidance to assist with evaluating when a set of transferred assets and activities (collectively, the "set") is a business and provides a screen to determine when a set is not a business. Under the new guidance, when substantially all of the fair value of gross assets acquired (or disposed of) is concentrated in a single identifiable asset, or group of similar assets, the assets acquired would not represent a business. Also, to be considered a business, an acquisition would have to include an input and a substantive process that together significantly contribute to the ability to produce outputs. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, and should be applied on a prospective basis to any transactions occurring within the period of adoption. The Company adopted the standard in the first quarter of 2018 and will apply the standard when relevant. In January 2017, the FASB issued amended guidance that eliminates the requirement to determine the fair value of individual assets and liabilities of a reporting unit to measure goodwill impairment. Under the amendments in the new guidance, goodwill impairment testing will be performed by comparing the fair value of the reporting unit with its carrying amount and recognizing an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. The new standard is effective for annual and interim goodwill impairment tests in fiscal years beginning after December 15, 2019, and should be applied on a prospective basis. Early adoption is permitted for annual or interim goodwill impairment testing performed after January 1, 2017. The Company has not elected early adoption and does not expect any impact on the Company’s consolidated financial statements. In March 2017, the FASB issued final guidance on the presentation of net periodic pension and postretirement benefit cost (net benefit cost). Currently, net benefit cost is reported as an employee cost within operating income. This new guidance requires the bifurcation of net periodic pension and postretirement benefit costs. Service cost will be part of operating income (and is the only piece eligible to be capitalized). All other components will be shown outside of operations. The new standard is effective for annual and interim periods in fiscal years beginning after December 15, 2017, and should be applied on a retrospective basis, except for the amendments related to capitalization of benefit cost, which should be applied on a prospective basis. The Company adopted this amended guidance in the first quarter of 2018 by separately presenting “Pension and postretirement benefits” expense in its consolidated statements of income. In August 2017, the FASB issued amended guidance on the accounting for hedging activities. The amended guidance makes more hedging strategies qualify for hedge accounting. After initial qualification, the amended guidance permits a qualitative effectiveness assessment for certain hedges instead of a quantitative test, if the company can reasonably support an expectation of effectiveness throughout the term of the hedge. The amended guidance is effective for annual and interim periods beginning after January 1, 2019, but may be adopted immediately. The adoption should be on a cumulative effect basis and applied prospectively. The Company is currently evaluating the amended guidance but does not expect there to be an impact of adopting this guidance on the Company’s consolidated financial statements.

Other Income (Expense), Net (No

Other Income (Expense), Net (Notes)	3 Months Ended
Other Income (Expense), Net (Notes)	Mar. 31, 2018
Other Income and Expenses [Abstract]
Other Income and Other Expense Disclosure [Text Block]	Other income (expense), net consists of the following: Three Months Ended March 31, (In thousands) 2018 2017 Gain (loss) on investment in kaléo accounted for under fair value method $ 8,200 $ 3,300 Other 33 (14 ) Total $ 8,233 $ 3,286 See Note 7 for more details on the item broken out separately in the table above.

Acquisitions (Tables)

Acquisitions (Tables)	3 Months Ended
Acquisitions (Tables)	Mar. 31, 2018
Business Acquisition [Line Items]
Schedule Of Purchase Price Allocation	Based upon management’s valuation of the fair value of tangible and intangible assets acquired (net of cash acquired) and liabilities assumed, the allocation of the purchase price was as follows: (in Thousands) Accounts receivable $ 6,680 Inventories 10,342 Prepaid expenses and other current assets 240 Property, plant & equipment 32,662 Identifiable intangible assets: Customer relationships 24,000 Trade names 6,700 Trade payables & accrued expenses (8,135 ) Total identifiable net assets 72,489 Adjusted Net Purchase Price 82,860 Goodwill $ 10,371

Plants Shutdowns, Asset Impai25

Plants Shutdowns, Asset Impairments, Restructurings And Other (Tables)	3 Months Ended
	Mar. 31, 2018
Restructuring Charges [Abstract]
Schedule Of Accrued Expenses Associated With Asset Impairments And Exit And Disposal Activities	A reconciliation of the beginning and ending balances of accrued expenses associated with exit and disposal activities and charges associated with asset impairments and reported as “Asset impairments and costs associated with exit and disposal activities, net of adjustments” in the consolidated statements of income for the three months ended March 31, 2018 is as follows: (In thousands) Severance (a) Asset Impairments Other (b) Total Balance at January 1, 2018 $ 627 $ — $ 476 $ 1,103 Changes in 2018: Charges 123 — — 123 Cash spent (464 ) — (234 ) (698 ) Charges against assets — — — — Balance at March 31, 2018 $ 286 $ — $ 242 $ 528 (a) Severance Cash spent includes severance payments associated with the consolidation of North American PE Films manufacturing facilities. (b) Other primarily includes other restructuring costs associated with Aluminum Extrusions.

Inventories (Tables)

Inventories (Tables)	3 Months Ended
Inventories (Tables)	Mar. 31, 2018
Inventory, Net [Abstract]
Schedule of Inventory, Current	The components of inventories are as follows: March 31, December 31, (In thousands) 2018 2017 Finished goods $ 24,154 $ 20,281 Work-in-process 10,615 11,958 Raw materials 31,089 35,909 Stores, supplies and other 19,500 18,759 Total $ 85,358 $ 86,907

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
Earnings Per Share (Tables)	Mar. 31, 2018
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	Diluted earnings per share is computed by dividing net income by the weighted average common and potentially dilutive common equivalent shares outstanding, determined as follows: Three Months Ended March 31, (In thousands) 2018 2017 Weighted average shares outstanding used to compute basic earnings per share 32,982 32,920 Incremental dilutive shares attributable to stock options and restricted stock 6 37 Shares used to compute diluted earnings per share 32,988 32,957

Accumulated Other Comprehensi28

Accumulated Other Comprehensive Income (Loss) (Tables)	3 Months Ended
Accumulated Other Comprehensive Income (Loss) (Tables)	Mar. 31, 2018	Mar. 31, 2017
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule Of After-Tax Changes In Accumulated Other Comprehensive Income (Loss)	The following table summarizes the after-tax changes in accumulated other comprehensive income (loss) for the three months ended March 31, 2018 : (In thousands) Foreign currency translation adjustment Gain (loss) on derivative financial instruments Pension and other post-retirement benefit adjustments Total Beginning balance, January 1, 2018 $ (86,178 ) $ 459 $ (90,950 ) $ (176,669 ) Other comprehensive income (loss) before reclassifications 1,906 (132 ) — 1,774 Amounts reclassified from accumulated other comprehensive income (loss) — (153 ) 2,612 2,459 Net other comprehensive income (loss) - current period 1,906 (285 ) 2,612 4,233 Ending balance, March 31, 2018 $ (84,272 ) $ 174 $ (88,338 ) $ (172,436 ) The following table summarizes the after-tax changes in accumulated other comprehensive income (loss) for the three months ended March 31, 2017 : (In Thousands) Foreign Gain (loss) on Pension and Total Beginning balance, January 1, 2017 $ (93,970 ) $ 863 $ (90,127 ) $ (183,234 ) Other comprehensive income (loss) before reclassifications 4,632 528 — 5,160 Amounts reclassified from accumulated other comprehensive income (loss) — (154 ) 1,950 1,796 Net other comprehensive income (loss) - current period 4,632 374 1,950 6,956 Ending balance, March 31, 2017 $ (89,338 ) $ 1,237 $ (88,177 ) $ (176,278 )
Schedule Of Reclassifications Of Balances Out Of Accumulated Other Comprehensive Income (Loss) Into Net Income		Reclassifications of balances out of accumulated other comprehensive income (loss) into net income for the three months ended March 31, 2018 are summarized as follows: (In thousands) Amount Location of gain Gain (loss) on derivative financial instruments: Aluminum future contracts, before taxes $ 232 Cost of sales Foreign currency forward contracts, before taxes (41 ) Selling, general & administrative Foreign currency forward contracts, before taxes 15 Cost of sales Total, before taxes 206 Income tax expense (benefit) 53 Income taxes Total, net of tax $ 153 Amortization of pension and other post-retirement benefits: Actuarial gain (loss) and prior service costs, before taxes $ (3,374 ) (a) Income tax expense (benefit) (762 ) Income taxes Total, net of tax $ (2,612 ) (a) This component of accumulated other comprehensive income (loss) is included in the computation of net periodic pension cost (see Note 9 for additional detail). Reclassifications of balances out of accumulated other comprehensive income (loss) into net income for the three months ended March 31, 2017 are summarized as follows: (In thousands) Amount Location of gain Gain (loss) on derivative financial instruments: Aluminum future contracts, before taxes $ 233 Cost of sales Foreign currency forward contracts, before taxes 15 Cost of sales Total, before taxes 248 Income tax expense (benefit) 94 Income taxes Total, net of tax $ 154 Amortization of pension and other post-retirement benefits: Actuarial gain (loss) and prior service costs, before taxes $ (3,061 ) (a) Income tax expense (benefit) (1,111 ) Income taxes Total, net of tax $ (1,950 ) (a) This component of accumulated other comprehensive income (loss) is included in the computation of net periodic pension cost (see Note 9 for additional detail).

Derivative Financial Instrume29

Derivative Financial Instruments (Tables)	3 Months Ended
Derivative Financial Instruments (Tables)	Mar. 31, 2018
Derivatives, Fair Value [Line Items]
Schedule Of Pretax Effect On Net Income (Loss) And Other Comprehensive Income (Loss) Of Derivative Instruments Classified As Cash Flow Hedges	The pretax effect on net income (loss) and other comprehensive income (loss) of derivative instruments classified as cash flow hedges and described in the previous paragraphs for the three month periods ended March 31, 2018 and 2017 is summarized in the table below: (In thousands) Cash Flow Derivative Hedges Three Months Ended March 31, Aluminum Futures Contracts Foreign Currency Forwards 2018 2017 2018 2018 2017 Amount of pre-tax gain (loss) recognized in other comprehensive income (loss) $ (392 ) $ 846 $ — $ 170 $ — Location of gain (loss) reclassified from accumulated other comprehensive income (loss) into net income (loss) (effective portion) Cost of Cost of Cost of Selling, general & admin Cost of Amount of pre-tax gain (loss) reclassified from accumulated other comprehensive income (loss) to net income (loss) (effective portion) $ 232 $ 233 $ 15 $ (41 ) $ 15
Aluminum Futures Contracts
Derivatives, Fair Value [Line Items]
Summary Of Location And Fair Value Of Derivative Financial Instruments	The table below summarizes the location and gross amounts of aluminum futures contract fair values (Level 2) in the consolidated balance sheets as of March 31, 2018 and December 31, 2017 : March 31, 2018 December 31, 2017 (In thousands) Balance Sheet Account Fair Value Balance Sheet Account Fair Value Derivatives Designated as Hedging Instruments Asset derivatives: Accrued Expenses $ 491 Prepaid expenses and other $ 578 Liability derivatives: Accrued Expenses $ (553 ) Prepaid expenses and other $ (16 ) Net asset (liability) $ (62 ) $ 562

Derivative Financial Instrume30

Derivative Financial Instruments Foreign Currency Forward Contracts Table (Tables)	3 Months Ended
	Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	Tredegar uses derivative financial instruments for the purpose of hedging margin exposure from fixed-price forward sales contracts in Aluminum Extrusions and exposure from currency volatility that exist as part of ongoing business operations (primarily in Flexible Packaging Films). These derivative financial instruments are designated as and qualify as cash flow hedges and are recognized in the consolidated balance sheet at fair value. The fair value of derivative instruments recorded on the consolidated balance sheets are based upon Level 2 inputs. If individual derivative instruments with the same counterparty can be settled on a net basis, the Company records the corresponding derivative fair values as a net asset or net liability. In the normal course of business, Aluminum Extrusions enters into fixed-price forward sales contracts with certain customers for the future sale of fixed quantities of aluminum extrusions at scheduled intervals. In order to hedge margin exposure created from the fixing of future sales prices relative to volatile raw material (aluminum) costs, Aluminum Extrusions enters into a combination of forward purchase commitments and futures contracts to acquire or hedge aluminum, based on the scheduled purchases for the firm sales commitments. The fixed-price firm sales commitments and related hedging instruments generally have durations of not more than 12 months, and the notional amount of aluminum futures contracts that hedged future purchases of aluminum to meet fixed-price forward sales contract obligations was $17.7 million ( 18.2 million pounds of aluminum) at March 31, 2018 and $8.2 million ( 8.0 million pounds of aluminum) at December 31, 2017 . The table below summarizes the location and gross amounts of aluminum futures contract fair values (Level 2) in the consolidated balance sheets as of March 31, 2018 and December 31, 2017 : March 31, 2018 December 31, 2017 (In thousands) Balance Sheet Account Fair Value Balance Sheet Account Fair Value Derivatives Designated as Hedging Instruments Asset derivatives: Accrued Expenses $ 491 Prepaid expenses and other $ 578 Liability derivatives: Accrued Expenses $ (553 ) Prepaid expenses and other $ (16 ) Net asset (liability) $ (62 ) $ 562 In the event that a counterparty to an aluminum fixed-price forward sales contract chooses not to take delivery of its aluminum extrusions, the customer is contractually obligated to compensate Aluminum Extrusions for any losses on the related aluminum futures and/or forward contracts through the date of cancellation. The table below summarizes the location and gross amounts of foreign currency forward contract fair values (Level 2) in the consolidated balance sheets as of March 31, 2018 and December 31, 2017 : March 31, 2018 December 31, 2017 (In Thousands) Balance Sheet Fair Balance Sheet Fair Derivatives Designated as Hedging Instruments Asset derivatives: Accrued Expenses $ — Accrued Expenses $ — Liability derivatives: Accrued Expenses (330 ) Accrued Expenses (558 ) Net asset (liability) (330 ) $ (558 ) The Company's earnings are exposed to foreign currency exchange risk primarily through the translation of the financial statements of subsidiaries that have a functional currency other than the U.S. Dollar. On September 29, 2017, the Flexible Packaging Films business unit in Brazil (“Terphane Ltda.”) entered into 15 monthly foreign exchange average forward rate contracts to purchase Brazilian Real (“R$”) and sell U.S. Dollars covering the period from October 2017 through December 2018. On January 29, 2018, Terphane Ltda. entered into an additional 6 monthly foreign exchange average forward rate contracts to purchase Brazilian Real and sell U.S. Dollars covering the period from January 2019 through June 2019. All of these foreign currency exchange contracts have been designated and qualify as cash flow hedges of Terphane Ltda.'s forecasted sales to customers quoted or priced in U.S. Dollars over that period. By changing the currency risk associated with these U.S. Dollar sales, the derivatives have the effect of offsetting operating costs quoted or priced in Brazilian Real and decreasing the net exposure to Brazilian Real in the consolidated statements of income. The aggregate notional amount of open foreign exchange contracts at March 31, 2018 was $15.0 million ( R$48.5 million ). These derivative contracts involve elements of market risk that are not reflected on the consolidated balance sheet, including the risk of dealing with counterparties and their ability to meet the terms of the contracts. The counterparties to any forward purchase commitments are major aluminum brokers and suppliers, and the counterparties to any aluminum futures contracts are major financial institutions. Fixed-price forward sales contracts are only made available to the best and most credit-worthy customers. The counterparties to the Company’s foreign currency cash flow hedge contracts are major financial institutions. The pretax effect on net income (loss) and other comprehensive income (loss) of derivative instruments classified as cash flow hedges and described in the previous paragraphs for the three month periods ended March 31, 2018 and 2017 is summarized in the table below: (In thousands) Cash Flow Derivative Hedges Three Months Ended March 31, Aluminum Futures Contracts Foreign Currency Forwards 2018 2017 2018 2018 2017 Amount of pre-tax gain (loss) recognized in other comprehensive income (loss) $ (392 ) $ 846 $ — $ 170 $ — Location of gain (loss) reclassified from accumulated other comprehensive income (loss) into net income (loss) (effective portion) Cost of Cost of Cost of Selling, general & admin Cost of Amount of pre-tax gain (loss) reclassified from accumulated other comprehensive income (loss) to net income (loss) (effective portion) $ 232 $ 233 $ 15 $ (41 ) $ 15 As of March 31, 2018 , the Company expects $0.1 million of unrealized after-tax gains on derivative instruments reported in accumulated other comprehensive income (loss) to be reclassified to earnings within the next 12 months. For the three month periods ended March 31, 2018 and 2017 , net gains or losses realized, from previously unrealized net gains or losses on hedges that had been discontinued, were not material. The table below summarizes the location and gross amounts of foreign currency forward contract fair values (Level 2) in the consolidated balance sheets as of March 31, 2018 and December 31, 2017 : March 31, 2018 December 31, 2017 (In Thousands) Balance Sheet Fair Balance Sheet Fair Derivatives Designated as Hedging Instruments Asset derivatives: Accrued Expenses $ — Accrued Expenses $ — Liability derivatives: Accrued Expenses (330 ) Accrued Expenses (558 ) Net asset (liability) (330 ) $ (558 )

Pension And Other Post-Retire31

Pension And Other Post-Retirement Benefits (Tables)	3 Months Ended
Pension And Other Post-Retirement Benefits (Tables)	Mar. 31, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Schedule Of Components Of Net Periodic Benefit Cost For Pension And Other Post-Retirement Benefit Programs	The components of net periodic benefit cost for the pension and other post-retirement benefit programs reflected in the consolidated statements of income are shown below: Pension Benefits Other Post-Retirement Benefits Three Months Ended March 31, Three Months Ended March 31, (In thousands) 2018 2017 2018 2017 Service cost $ 5 $ 58 $ 10 $ 9 Interest cost 2,882 3,164 69 76 Expected return on plan assets (3,761 ) (3,736 ) — — Amortization of prior service costs, (gains) losses and net transition asset 3,428 3,123 (54 ) (61 ) Net periodic benefit cost $ 2,554 $ 2,609 $ 25 $ 24

Segment Reporting (Tables)

Segment Reporting (Tables)	3 Months Ended
Segment Reporting (Tables)	Mar. 31, 2018
Segment Reporting [Abstract]
Schedule Of Segment Reporting Information By Segment	The following table presents net sales and operating profit by segment for the three -month periods ended March 31, 2018 and 2017 : Three Months Ended March 31, (In thousands) 2018 2017 Net Sales PE Films $ 93,249 $ 86,411 Flexible Packaging Films 28,437 26,710 Aluminum Extrusions 128,235 99,599 Total net sales 249,921 212,720 Add back freight 8,790 8,306 Sales as shown in the Consolidated Statements of Income $ 258,711 $ 221,026 Operating Profit (Loss) PE Films: Ongoing operations $ 14,034 $ 9,031 Plant shutdowns, asset impairments, restructurings and other (1,052 ) (2,068 ) Flexible Packaging Films: Ongoing operations 1,715 (1,998 ) Plant shutdowns, asset impairments, restructurings and other — — Aluminum Extrusions: Ongoing operations 10,199 9,829 Plant shutdowns, asset impairments, restructurings and other (53 ) (4,341 ) Total 24,843 10,453 Interest income 56 74 Interest expense 1,644 1,180 Gain (loss) on investment in kaléo accounted for under fair value method 8,200 3,300 Stock option-based compensation costs 86 3 Corporate expenses, net 7,918 6,523 Income before income taxes 23,451 6,121 Income taxes 5,287 2,418 Net income $ 18,164 $ 3,703
Schedule Of Identifiable Assets By Segment	The following table presents identifiable assets by segment at March 31, 2018 and December 31, 2017 : (In thousands) March 31, 2018 December 31, 2017 PE Films $ 293,662 $ 289,514 Flexible Packaging Films 47,810 49,915 Aluminum Extrusions 272,609 268,127 Subtotal 614,081 607,556 General corporate 105,394 111,696 Cash and cash equivalents 36,135 36,491 Total $ 755,610 $ 755,743

Segment Reporting Net Sales by

Segment Reporting Net Sales by Geographic Area Table (Tables) 1	3 Months Ended
	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer [Text Block]	The following tables disaggregate the Company’s revenue by geographic area and product group for the three months ended March 31, 2018 and 2017: Net Sales by Geographic Area (b) Three Months Ended March 31, (In thousands) 2018 2017 (c) United States $ 159,562 $ 129,901 Exports from the United States to: Asia 23,592 18,722 Canada 13,298 13,092 Europe 1,822 2,358 Latin America 3,052 3,730 Operations outside the United States: Brazil 23,151 21,360 The Netherlands 11,928 12,760 Hungary 8,818 5,191 China 2,274 3,405 India 2,424 2,201 Total (a) $ 249,921 $ 212,720
Disaggregation of Revenue [Table Text Block]	Net Sales by Product Group Three Months Ended March 31, (In thousands) 2018 2017 (c) PE Films: Personal care materials $ 61,644 $ 61,299 Surface protection films 29,815 23,441 LED lighting products & other films 1,790 1,672 Subtotal 93,249 86,412 Flexible Packaging Films 28,437 26,710 Aluminum Extrusions: Nonresidential building & construction 65,280 52,210 Consumer durables 15,189 12,097 Distribution 10,971 6,334 Automotive 9,673 10,174 Residential building & construction 9,601 7,272 Machinery & equipment 9,094 7,205 Electrical 8,427 4,306 Subtotal 128,235 99,598 Total $ 249,921 $ 212,720

Segment Reporting Net Sales b34

Segment Reporting Net Sales by Product Group Table (Tables)	3 Months Ended
Segment Reporting Net Sales by Product Group Table (Tables)	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	Net Sales by Product Group Three Months Ended March 31, (In thousands) 2018 2017 (c) PE Films: Personal care materials $ 61,644 $ 61,299 Surface protection films 29,815 23,441 LED lighting products & other films 1,790 1,672 Subtotal 93,249 86,412 Flexible Packaging Films 28,437 26,710 Aluminum Extrusions: Nonresidential building & construction 65,280 52,210 Consumer durables 15,189 12,097 Distribution 10,971 6,334 Automotive 9,673 10,174 Residential building & construction 9,601 7,272 Machinery & equipment 9,094 7,205 Electrical 8,427 4,306 Subtotal 128,235 99,598 Total $ 249,921 $ 212,720

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
Income Taxes (Tables)	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Schedule Of Effective Income Tax Rate For Continuing Operations	he significant differences between the U.S. federal statutory rate and the effective income tax rate for the three months ended March 31, 2018 and 2017 are as follows: (In thousands, except percentages) 2018 2017 Three Months Ended March 31, Amount % Amount % Income tax expense at federal statutory rate $ 4,925 21.0 $ 2,142 35.0 Foreign rate differences 578 2.4 362 5.9 State taxes, net of federal income tax benefit 321 1.4 254 4.2 Stock-based compensation 173 0.7 159 2.6 Non-deductible expenses 84 0.4 118 1.9 Global Intangible Low Tax Income (GILTI) 32 0.1 — — Tax contingency accruals and tax settlements — — 72 1.2 Changes in estimates related to prior year tax provision — — (38 ) (0.7 ) Unremitted earnings from foreign operations — — (67 ) (1.1 ) Domestic production activities deduction — — (171 ) (2.8 ) Increase in value of kaleo investment held abroad — — (406 ) (6.6 ) Research and development tax credit (100 ) (0.4 ) (147 ) (2.4 ) Foreign Derived Intangible Income (FDII) (153 ) (0.7 ) — — Foreign tax incentives (211 ) (0.9 ) — — Valuation allowance due to foreign losses and impairments (362 ) (1.5 ) 140 2.3 Effective income tax rate $ 5,287 22.5 $ 2,418 39.5

Other Income (Expense), Net Oth

Other Income (Expense), Net Other Income (Expense), Net Summary Table (Tables)	3 Months Ended
	Mar. 31, 2018
Other Income and Expenses [Abstract]
Schedule of Other Nonoperating Income (Expense) [Table Text Block]	Three Months Ended March 31, (In thousands) 2018 2017 Gain (loss) on investment in kaléo accounted for under fair value method $ 8,200 $ 3,300 Other 33 (14 ) Total $ 8,233 $ 3,286

Basis Of Presentation Revenue R

Basis Of Presentation Revenue Recognition Disclosures (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Gross, Current	$ 129,056	$ 113,556
Other Receivables	4,604	9,883
Accounts Receivable, Gross	133,660	123,439
Allowance for Doubtful Accounts, Premiums and Other Receivables	(3,109)	(3,304)
Receivables, Net, Current	$ 130,551	$ 120,135

Basis Of Presentation Accounts

Basis Of Presentation Accounts Receivables Table (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and other receivables, net of allowance for doubtful accounts and sales returns of $3,109 in 2018 and $3,304 in 2017	$ 130,551	$ 120,135

Acquisitions (Narrative) (Detai

Acquisitions (Narrative) (Details) - USD ($) $ in Thousands	Feb. 15, 2017	Mar. 31, 2018	Jun. 30, 2017	Mar. 31, 2017
Business Acquisition [Line Items]
Payment for Contingent Consideration Liability, Investing Activities		$ (4,250)
Sales		258,711		$ 221,026
Payments to Acquire Property, Plant, and Equipment		$ 5,062		$ 12,718
Effective Income Tax Rate Reconciliation, Percent		22.50%		39.50%
Futura Industries [Member]
Business Acquisition [Line Items]
Business Combinations Accretion to Diluted Earnings Per Share
Business Combination Contract Price	$ 92,000
Business Combination, Consideration Transferred	87,000
Business Combination, Contingent Consideration, Asset, Current		5,000
Business Combinations Purchase Price Allocated Net of Contingent Consideration	$ 82,860
Payment for Contingent Consideration Liability, Investing Activities		4,300
Tax Recovery Life of Goodwill for Amortization	15 years
Percentage of outstanding equity interests acquired	100.00%
Goodwill, Purchase Accounting Adjustments			$ 100
Aluminum Extrusions
Business Acquisition [Line Items]
Income Loss From Ongoing Operations		$ 10,199		$ 9,829
Customer Relationships [Member] \| Futura Industries [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life	12 years
Trade Names [Member] \| Futura Industries [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life	13 years

Acquisitions (Schedule Of Purch

Acquisitions (Schedule Of Purchase Price Allocation) (Details) - USD ($) $ in Thousands	Feb. 15, 2017	Mar. 31, 2018	Dec. 31, 2017
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Goodwill		$ 128,219	$ 128,208
Futura Industries [Member]
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Accounts receivable	$ 6,680
Inventories	10,342
Property, plant & equipment	32,662
Total identifiable net assets	72,489
Prepaid Expense and Other Assets	240
Current Liabilities	(8,135)
Business Combination, Consideration Transferred	82,860
Futura Industries [Member] \| Goodwill [Member]
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Goodwill	10,371
Futura Industries [Member] \| Customer relationships
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Identifiable finite-lived intangible assets	24,000
Futura Industries [Member] \| Trade Names [Member]
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Identifiable finite-lived intangible assets	$ 6,700

Plants Shutdowns, Asset Impai41

Plants Shutdowns, Asset Impairments, Restructurings And Other (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2016	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Payments to Acquire Property, Plant, and Equipment	$ 5,062	$ 12,718
Production LIne Start-up and Ramp-up Costs	1,000	1,700
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	23,451	6,121
Business Development Expenses		300
(Gain)/loss on asset impairments and divestitures	0	50
Other Non-Operating and Non-Recurring Charges [Abstract]
Unrealized gain (loss) on investment under fair value method	8,200	3,300
Gain (Loss) on Disposition of Assets	0	164
Payments for Restructuring	698
Restructuring Reserve	528			$ 1,103
kaleo
Other Non-Operating and Non-Recurring Charges [Abstract]
Unrealized gain (loss) on investment under fair value method	8,200	3,300
Unrealized gain (loss) on investment under fair value method, after taxes	$ 6,400	2,500
Fair Value Inputs, Discount Rate
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
PE Films
Restructuring Cost and Reserve [Line Items]
Production LIne Start-up and Ramp-up Costs		1,400
Pretax charges for severance and other employee-related costs	$ 100
Aluminum Extrusions
Restructuring Cost and Reserve [Line Items]
Production LIne Start-up and Ramp-up Costs		300
Cast House Explosion pretax income		400
Insured Event, Gain (Loss)		300
Loss from Catastrophes		100
Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Pretax charges for severance and other employee-related costs		300
Severance (a)
Other Non-Operating and Non-Recurring Charges [Abstract]
Payments for Restructuring	464
Restructuring Reserve	286			$ 627
Aluminum Extrusions Manufacturing Facility In Newnan Georgia [Member] \| Aluminum Extrusions
Restructuring Cost and Reserve [Line Items]
Professional Fees	300
Other Non-Operating and Non-Recurring Charges [Abstract]
Environmental Exit Costs, Anticipated Cost		300
FilmProductsManufacturingFacilityInLakeZurichIllinois [Member] \| Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Plant Shutdown Related Expenditures Gross		700
Pretax charges for severance and other employee-related costs		200
(Gain)/loss on asset impairments and divestitures		100
Accelerated Depreciation Expense		100
Other Restructuring Costs		300
Other Plant Consolidation Expenses - Cost of Goods Sold		$ 200
Pension Plan [Member]
Restructuring Cost and Reserve [Line Items]
Defined Benefit Plan Estimated Required Future Employer Contributions In Current Fiscal Year	$ 8,400

Plants Shutdowns, Asset Impai42

Plants Shutdowns, Asset Impairments, Restructurings And Other (Schedule Of Accrued Expenses Associated With Asset Impairments And Exit And Disposal Activities) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)
Restructuring Reserve [Roll Forward]
January 1, 2018	$ 1,103
Charges	123
Cash spent	(698)
Charges against assets	0
March 31, 2018	528
Severance (a)
Restructuring Reserve [Roll Forward]
January 1, 2018	627
Charges	123
Cash spent	(464)
March 31, 2018	286
Long Lived Asset Impairment [Member]
Restructuring Reserve [Roll Forward]
January 1, 2018	0
Charges	0
Cash spent	0
Charges against assets	0
March 31, 2018	0
Other
Restructuring Reserve [Roll Forward]
January 1, 2018	476
Charges	0
Cash spent	(234)
Charges against assets	0
March 31, 2018	$ 242

Inventories (Schedule Of Compon

Inventories (Schedule Of Components Of Inventories) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Inventory, Net [Abstract]
Finished goods	$ 24,154	$ 20,281
Work-in-process	10,615	11,958
Raw materials	31,089	35,909
Stores, supplies and other	19,500	18,759
Total	$ 85,358	$ 86,907

Earnings Per Share (Narrative)

Earnings Per Share (Narrative) (Details) - shares	3 Months Ended
Earnings Per Share (Narrative) (Details) - shares	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	313,834	263,596

Earnings Per Share (Schedule Of

Earnings Per Share (Schedule Of Calculation Of Numerator And Denominator In Earnings Per Share) (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Abstract]
Weighted average shares outstanding used to compute basic earnings per share	32,982	32,920
Incremental dilutive shares attributable to stock options and restricted stock	6	37
Shares used to compute diluted earnings per share	32,988	32,957

Accumulated Other Comprehensi46

Accumulated Other Comprehensive Income (Loss) (Schedule Of After-Tax Changes In Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning of Period	$ (176,669)	$ (183,234)
Other comprehensive income (loss) before reclassifications	1,774	5,160
Amounts reclassified from accumulated other comprehensive income (loss)	2,459	1,796
Net other comprehensive income (loss) - current period	4,233	6,956
End of Period	(172,436)	(176,278)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning of Period	(86,178)	(93,970)
Other comprehensive income (loss) before reclassifications	1,906	4,632
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Net other comprehensive income (loss) - current period	1,906	4,632
End of Period	(84,272)	(89,338)
Gain (Loss) on Derivative Financial Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning of Period	459	863
Other comprehensive income (loss) before reclassifications	(132)	528
Amounts reclassified from accumulated other comprehensive income (loss)	(153)	(154)
Net other comprehensive income (loss) - current period	(285)	374
End of Period	174	1,237
Pension & Other Post-retirement Benefit Adjust.
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning of Period	(90,950)	(90,127)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	2,612	1,950
Net other comprehensive income (loss) - current period	2,612	1,950
End of Period	$ (88,338)	$ (88,177)

Accumulated Other Comprehensi47

Accumulated Other Comprehensive Income (Loss) (Schedule Of Reclassifications Of Balances Out Of Accumulated Other Comprehensive Income (Loss) Into Net Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (172,436)	$ (176,278)	$ (176,669)	$ (183,234)
Cost of goods sold	(203,189)	(179,761)
Selling, general and administrative	21,829	19,949
Income before income taxes	(23,451)	(6,121)
Income taxes from continuing operations	(5,287)	(2,418)
Net income	18,164	3,703
Foreign Currency Translation
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(84,272)	(89,338)	(86,178)	(93,970)
Gain (Loss) on Derivative Financial Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	174	1,237	459	863
Pension & Other Post-retirement Benefit Adjust.
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(88,338)	(88,177)	$ (90,950)	$ (90,127)
Reclassification Out Of Accumulated Other Comprehensive Income \| Gain (Loss) on Derivative Financial Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	(206)	(248)
Income taxes from continuing operations	(53)	(94)
Net income	153	154
Reclassification Out Of Accumulated Other Comprehensive Income \| Gain (Loss) on Derivative Financial Instruments \| Aluminum Futures Contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold	232	233
Reclassification Out Of Accumulated Other Comprehensive Income \| Pension & Other Post-retirement Benefit Adjust.
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Actuarial gain (loss) and prior service costs, before taxes	(3,374)	(3,061)
Income taxes from continuing operations	762	1,111
Net income	(2,612)	(1,950)
Selling, General and Administrative Expenses [Member] \| Reclassification Out Of Accumulated Other Comprehensive Income \| Gain (Loss) on Derivative Financial Instruments \| Foreign Currency Forward Contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Selling, general and administrative	(41)
Cost of Sales [Member] \| Reclassification Out Of Accumulated Other Comprehensive Income \| Gain (Loss) on Derivative Financial Instruments \| Foreign Currency Forward Contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold	$ (15)	$ (15)

Investments (Narrative) (Detail

Investments (Narrative) (Details) 1 - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2008	Aug. 31, 2007
Unrealized gain (loss) on investment under fair value method	$ 8,200	$ 3,300
Gain (Loss) on Disposition of Assets	$ 0	164
kaleo
Total cash invested in private company					$ 7,500
Ownership interest percentage	20.00%
Carrying value	$ 62,200	23,500	$ 20,200	$ 54,000
Unrealized gain (loss) on investment under fair value method	8,200	3,300
Unrealized Gain Loss On Investment Under Fair Value Method After Taxes	$ 6,400	$ 2,500
Weighted average cost of capital
Basis point decrease of weighted average cost of capital assumption
Basis point increase of weighted average cost of capital assumption
Alleghany and Bath County, Virginia [Member]
Cost Method Investments	$ 1,600			1,600
Harbinger Capital Partners Special Situations Fund L P [Member]
Cost Method Investments	$ 1,700			$ 1,700

Derivative Financial Instrume49

Derivative Financial Instruments (Narrative) (Details) R$ in Thousands, $ in Thousands, lb in Millions	3 Months Ended
	Mar. 31, 2018USD ($)lb	Mar. 31, 2017lb	Mar. 31, 2018BRL (R$)	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Derivative [Line Items]
Amounts of unrealized after tax gains (losses) to be Reclassified within Twelve Months	$ (100)
Aluminum Futures Contracts
Derivative [Line Items]
Notional Amount				$ 17,700	$ 8,200
Weight of aluminum that hedged future purchase of aluminum to meet fixed - price forward sales contract obligations, lbs \| lb	18.2	8
Net asset (liability), Fair Value				(62)	562
Accrued Expenses [Member] \| Derivatives Designated As Hedging Instruments [Member] \| Aluminum Futures Contracts
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset				491	578
Derivative Liability, Fair Value, Gross Liability				553	$ 16
Cost of Sales [Member] \| Foreign Currency Forwards And Options [Member]
Derivative [Line Items]
Notional Amount			R$ 48500	$ 15,000

Derivative Financial Instrume50

Derivative Financial Instruments (Summary Of Location And Fair Value Of Derivative Financial Instruments) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Flexible Packaging Films [Member] [Domain] \| Accrued Expenses [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ (330)	$ (558)
Aluminum Futures Contracts
Derivatives, Fair Value [Line Items]
Net asset (liability), Fair Value	(62)	562
Derivatives Designated As Hedging Instruments [Member] \| Flexible Packaging Films [Member] [Domain] \| Accrued Expenses [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	0
Liability derivatives: Fair Value	330	558
Derivatives Designated As Hedging Instruments [Member] \| Aluminum Futures Contracts \| Accrued Expenses [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	491	578
Liability derivatives: Fair Value	$ (553)	$ (16)

Derivative Financial Instrume51

Derivative Financial Instruments (Schedule Of Pretax Effect On Net Income (Loss) And Other Comprehensive Income (Loss) Of Derivative Instruments Classified As Cash Flow Hedges) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Foreign Currency Forwards And Options [Member] \| Cost Of Sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pretax gain (loss) reclassified from accumulated other comprehensive income (loss) to net income (loss) (effective portion)	$ 15	$ 15
Foreign Currency Forwards And Options [Member] \| Selling, General and Administrative Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pretax gain (loss) reclassified from accumulated other comprehensive income (loss) to net income (loss) (effective portion)	(41)
Cash Flow Derivative Hedges \| Aluminum Futures Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pretax gain (loss) recognized in other comprehensive income (loss)	(392)	846
Cash Flow Derivative Hedges \| Aluminum Futures Contracts \| Cost Of Sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pretax gain (loss) reclassified from accumulated other comprehensive income (loss) to net income (loss) (effective portion)	232	233
Cash Flow Derivative Hedges \| Foreign Currency Forwards And Options
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pretax gain (loss) recognized in other comprehensive income (loss)		$ 0
Cash Flow Derivative Hedges \| Foreign Currency Forwards And Options \| Cost Of Sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pretax gain (loss) recognized in other comprehensive income (loss)	0
Cash Flow Derivative Hedges \| Foreign Currency Forwards And Options \| Selling, General and Administrative Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pretax gain (loss) recognized in other comprehensive income (loss)	$ 170

Pension And Other Post-Retire52

Pension And Other Post-Retirement Benefits (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	$ (97.5)	$ (99.5)
Other Post-Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Contribution to pension plans for continuing operations		$ 0.3
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Expected required contributions	8.4
Contribution to pension plans for continuing operations	1.2
Accrued Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Plan, Current	$ 0.6

Pension And Other Post-Retire53

Pension And Other Post-Retirement Benefits (Schedule Of Components Of Net Periodic Benefit Cost For Pension And Other Post-Retirement Benefit Programs) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 5	$ 58
Interest cost	2,882	3,164
Expected return on plan assets	(3,761)	(3,736)
Amortization of prior service costs, gains or losses and net transition asset	3,428	3,123
Net periodic benefit cost	2,554	2,609
Other Post-Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	10	9
Interest cost	69	76
Amortization of prior service costs, gains or losses and net transition asset	(54)	(61)
Net periodic benefit cost	$ 25	$ 24

Segment Reporting (Schedule Of

Segment Reporting (Schedule Of Segment Reporting Information By Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Assets	$ 755,610		$ 755,743
Total net sales	249,921	$ 212,720
Add back freight	8,790	8,306
Sales as shown in the Consolidated Statements of Income	258,711	221,026
Total Segment Income (Loss)	24,843	10,453
Interest income	56	74
Interest expense	1,644	1,180
Gain (loss) on investment in kaléo accounted for under fair value method	8,200	3,300
Gain (Loss) on Disposition of Assets	0	164
Stock option-based compensation costs	86	3
Corporate expenses, net	7,918	6,523
Income from continuing operations before income taxes	23,451	6,121
Income taxes from continuing operations	5,287	2,418
Net income	18,164	3,703
kaleo
Segment Reporting Information [Line Items]
Gain (loss) on investment in kaléo accounted for under fair value method	8,200	3,300
PE Films
Segment Reporting Information [Line Items]
Assets	293,662		289,514
Total net sales	93,249	86,411
Operating profit from ongoing operations	14,034	9,031
Plant shutdowns, asset impairments, restructurings and other	(1,052)	(2,068)
Flexible Packaging Films [Member] [Domain]
Segment Reporting Information [Line Items]
Assets	47,810		49,915
Total net sales	28,437	26,710
Operating profit from ongoing operations	1,715	(1,998)
Plant shutdowns, asset impairments, restructurings and other	0	0
Aluminum Extrusions
Segment Reporting Information [Line Items]
Assets	272,609		$ 268,127
Total net sales	128,235	99,599
Operating profit from ongoing operations	10,199	9,829
Plant shutdowns, asset impairments, restructurings and other	$ (53)	$ (4,341)

Segment Reporting (Schedule O55

Segment Reporting (Schedule Of Identifiable Assets By Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Stock option-based compensation costs	$ 86	$ 3
Subtotal	614,081		$ 607,556
General corporate	105,394		111,696
Cash and cash equivalents	36,135	$ 28,864	36,491	$ 29,511
Total assets	755,610		755,743
PE Films
Total assets	293,662		289,514
Flexible Packaging Films [Member] [Domain]
Total assets	47,810		49,915
Aluminum Extrusions
Total assets	$ 272,609		$ 268,127

Segment Reporting Schedule of R

Segment Reporting Schedule of Revenue by Geographic Location (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Net Sales	$ 249,921	$ 212,720
UNITED STATES
Disaggregation of Revenue [Line Items]
Net Sales	159,562	129,901
PE Films
Disaggregation of Revenue [Line Items]
Net Sales	93,249	86,411
PE Films \| Personal Care Materials [Member]
Disaggregation of Revenue [Line Items]
Net Sales	61,644	61,299
PE Films \| Surface Protection Films [Member]
Disaggregation of Revenue [Line Items]
Net Sales	29,815	23,441
PE Films \| Films For Other Markets [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,790	1,672
PE Films \| Film Products Subtotal [Member]
Disaggregation of Revenue [Line Items]
Net Sales	93,249	86,412
Flexible Packaging Films [Member] [Domain]
Disaggregation of Revenue [Line Items]
Net Sales	28,437	26,710
Aluminum Extrusions
Disaggregation of Revenue [Line Items]
Net Sales	128,235	99,599
Aluminum Extrusions \| Nonresidential Building And Construction [Member]
Disaggregation of Revenue [Line Items]
Net Sales	65,280	52,210
Aluminum Extrusions \| Consumer Durables [Member]
Disaggregation of Revenue [Line Items]
Net Sales	15,189	12,097
Aluminum Extrusions \| Distribution [Member]
Disaggregation of Revenue [Line Items]
Net Sales	10,971	6,334
Aluminum Extrusions \| Automotive [Member]
Disaggregation of Revenue [Line Items]
Net Sales	9,673	10,174
Aluminum Extrusions \| Residential Building And Construction [Member]
Disaggregation of Revenue [Line Items]
Net Sales	9,601	7,272
Aluminum Extrusions \| Aluminum Extrusions Subtotal [Member]
Disaggregation of Revenue [Line Items]
Net Sales	128,235	99,598
Aluminum Extrusions \| Machinery and Equipment BNL [Domain]
Disaggregation of Revenue [Line Items]
Net Sales	9,094	7,205
Aluminum Extrusions \| Electrical [Member]
Disaggregation of Revenue [Line Items]
Net Sales	8,427	4,306
Exports From United States [Member] \| Asia [Member]
Disaggregation of Revenue [Line Items]
Net Sales	23,592	18,722
Exports From United States [Member] \| CANADA
Disaggregation of Revenue [Line Items]
Net Sales	13,298	13,092
Exports From United States [Member] \| Europe [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,822	2,358
Exports From United States [Member] \| Latin America [Member]
Disaggregation of Revenue [Line Items]
Net Sales	3,052	3,730
Operations Outside United States [Member] \| BRAZIL
Disaggregation of Revenue [Line Items]
Net Sales	23,151	21,360
Operations Outside United States [Member] \| NETHERLANDS
Disaggregation of Revenue [Line Items]
Net Sales	11,928	12,760
Operations Outside United States [Member] \| HUNGARY
Disaggregation of Revenue [Line Items]
Net Sales	8,818	5,191
Operations Outside United States [Member] \| CHINA
Disaggregation of Revenue [Line Items]
Net Sales	2,274	3,405
Operations Outside United States [Member] \| INDIA
Disaggregation of Revenue [Line Items]
Net Sales	$ 2,424	$ 2,201

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($)	3 Months Ended
Income Taxes (Narrative) (Details) - USD ($)	Mar. 31, 2018	Mar. 31, 2017
Income Taxes [Line Items]
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount	$ (100,000)	$ (147,000)
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount	0	(171,000)
Effective Income Tax Rate Reconciliation Unremitted Earnings From Foreign Operations, Amount	0	(67,000)
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 4,925,000	$ 2,142,000
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Percent	(0.90%)	0.00%
effective income tax rate reconciliation, valuation allowance due to foreign losses	$ (362,000)	$ 140,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	35.00%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount	$ 578,000	$ 362,000
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Percent	0.00%	(2.80%)
Increase in value of kaléo investment held abroad	$ 0	$ (406,000)
Increase In Value Of kaléo Investment Held Abroad, Percentage	0.00%	(6.60%)
Effective Income Tax Rate Reconciliation Amount - FDII	$ (153,000)	$ 0
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	$ (211,000)	$ 0
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent	2.40%	5.90%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	$ 321,000	$ 254,000
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	1.40%	4.20%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount	$ 173,000	$ 159,000
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent	0.70%	2.60%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount	$ 84,000	$ 118,000
Effective Income Tax Rate Reconciliation Percent - FDII	(0.70%)	0.00%
Effective Income Tax Rate Reconciliation, Tax Settlement, Other, Amount	$ 0	$ 72,000
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent	0.40%	1.90%
Effective Income Tax Rate Reconciliation Amount - GILTI	$ 32,000	$ 0
Effective Income Tax Rate Reconciliation Percent - GILTI	0.10%	0.00%
Effective Income Tax Rate Reconciliation Operating Loss Carryforwards Valuation Allowance For Foreign Country	(1.50%)	2.30%
Effective Income Tax Rate Reconciliation Unremitted Earnings From Foreign Operations	0.00%	(1.10%)
Effective Income Tax Rate Reconciliation, Deduction, Amount	$ 5,287,000	$ 2,418,000
Income Tax Expense (Benefit)	$ 5,287,000	$ 2,418,000
Effective Income Tax Rate Reconciliation, Percent	22.50%	39.50%
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	$ 23,451,000	$ 6,121,000
Effective Income Tax Rate Reconciliation, Tax Contingency, Percent	0.00%	1.20%
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount	$ 0	$ (38,000)
Brazilian [Member]
Income Taxes [Line Items]
Effective income tax rate reconciliation social contribution on income	9.00%
Effective Income Tax Rate Reconciliation Federal Statutory Tax Rate Excluding Social Contribution On Income	25.00%
Effective Income Tax Rate Reconciliation Federal Statutory Tax Rate Including Social Contribution On Income	34.00%
Flexible Packaging Films [Member]
Income Taxes [Line Items]
Foreign Tax Credit - Brazil	$ 200,000
Terphane Ltda [Member]
Income Taxes [Line Items]
Current Effective Tax Rate Including Social Contribution On Income	15.25%
LengthBrazilianTaxIncentive	10 years

Income Taxes (Schedule Of Effec

Income Taxes (Schedule Of Effective Income Tax Rate For Continuing Operations) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income tax expense at federal statutory rate	21.00%	35.00%
State taxes, net of federal income tax benefit	1.40%	4.20%
Income tax contingency accruals and tax settlements	0.00%	1.20%
Unremitted earnings from foreign operations	0.00%	(1.10%)
Changes in estimates related to prior year tax provision	0.00%	(0.70%)
Non-deductible expenses	0.40%	1.90%
Valuation allowance for foreign operating loss carry-forwards	(1.50%)	2.30%
Research and development tax credit	(0.40%)	(2.40%)
Foreign rate differences	2.40%	5.90%
Foreign tax incentives	(0.90%)	0.00%
Domestic production activities deduction	0.00%	(2.80%)
Effective Income Tax Rate Reconciliation, Deduction, Amount	$ 5,287,000	$ 2,418,000
Effective income tax rate for income from continuing operations	22.50%	39.50%

Contingencies (Details)

Contingencies (Details)	Mar. 31, 2018in
3M vs. Tredegar
Loss Contingencies [Line Items]
Litigation Settlement, Amount	0.00001

Other Income (Expense), Net (De

Other Income (Expense), Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Other Income and Expenses [Abstract]
Other income (expense), net	$ 33	$ (14)
Other Nonoperating Income (Expense), Net - Other	$ 8,233	$ 3,286

Other Income (Expense), Net O61

Other Income (Expense), Net Other Income (Expense), Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Other Nonoperating Income (Expense), Net - Other	$ 8,233	$ 3,286
kaleo [Member]
Unrealized Gain (Loss) on Investments - kaleo	$ 8,200	$ 3,300