Basis Of Presentation	3 Months Ended
Mar. 31, 2019
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, 2019, the consolidated results of operations for the three months ended March 31, 2019 and 2018, the consolidated cash flows for the three months ended March 31, 2019 and 2018, and the consolidated changes in shareholders’ equity for the three months ended March 31, 2019 in accordance with U.S. generally accepted accounting principles (GAAP). 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 2019 and 2018 for this segment references 13-week periods ended March 31, 2019 and March 25, 2018, 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, 2018 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, 2018 (“2018 Form 10-K”) but does not include all disclosures required by GAAP. These financial statements should be read in conjunction with the consolidated financial statements and related notes included in the 2018 Form 10-K. The results of operations for the three months ended March 31, 2019, 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 Notes 12 & 13 for additional detail).

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, 2019, the consolidated results of operations for the three months ended March 31, 2019 and 2018, the consolidated cash flows for the three months ended March 31, 2019 and 2018, and the consolidated changes in shareholders’ equity for the three months ended March 31, 2019 in accordance with U.S. generally accepted accounting principles (GAAP). 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 2019 and 2018 for this segment references 13-week periods ended March 31, 2019 and March 25, 2018, 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, 2018 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, 2018 (“2018 Form 10-K”) but does not include all disclosures required by GAAP. These financial statements should be read in conjunction with the consolidated financial statements and related notes included in the 2018 Form 10-K. The results of operations for the three months ended March 31, 2019, 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 Notes 12 & 13 for additional detail).