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

No definition available.

Consolidated Statements Of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Retained Earnings	Trust For Savings Restoration Plan	Foreign Currency Translation	Gain (Loss) On Derivative Financial Instruments	Pension and other post-retirement benefit adjustments
Balance at Dec. 31, 2017	$ 343,780	$ 34,747	$ 487,230	$ (1,528)	$ (86,178)	$ 459	$ (90,950)
Balance, shares at Dec. 31, 2017		33,017,422
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	24,842		24,842
Foreign currency translation adjustment	(10,762)				(10,762)
Derivative financial instruments adjustment	(2,060)					(2,060)
Net actuarial gains (losses) and prior service costs	(1,118)						(1,118)
Amortization of prior service costs and net gains or losses	10,622						10,622
Cash dividends declared	(14,592)		(14,592)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures		102,762
Share Based Compensation Expense, Value	3,141	$ 3,141
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation		(17,558)
Issued upon exercise of stock options & other	1,332	$ 1,332
Issued upon exercise of stock options (including related income tax benefits) & other, shares		73,398
Tredegar common stock purchased by trust for savings restoration plan	0		31	(31)
Balance at Dec. 31, 2018	354,857	$ 38,892	497,511	(1,559)	(96,940)	(1,601)	(81,446)
Balance, shares at Dec. 31, 2018		33,176,024
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Payment, Tax Withholding, Share-based Payment Arrangement	(328)	$ (328)
Net income (loss)	48,259		48,259
Foreign currency translation adjustment	(3,723)				(3,723)
Derivative financial instruments adjustment	294					294
Net actuarial gains (losses) and prior service costs	(22,508)						(22,508)
Amortization of prior service costs and net gains or losses	8,273						8,273
Cash dividends declared	(15,325)		(15,325)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures		228,959
Share Based Compensation Expense, Value	7,292	$ 7,292
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation		(49,444)
Issued upon exercise of stock options & other	184	$ 184
Issued upon exercise of stock options (including related income tax benefits) & other, shares		9,500
Tredegar common stock purchased by trust for savings restoration plan	0		33	(33)
Balance at Dec. 31, 2019	376,749	$ 45,514	530,478	(1,592)	(100,663)	(1,307)	(95,681)
Balance, shares at Dec. 31, 2019		33,365,039
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Payment, Tax Withholding, Share-based Payment Arrangement	(854)	$ (854)
Net income (loss)	(75,444)		(75,444)
Foreign currency translation adjustment	(8,781)				(8,781)
Derivative financial instruments adjustment	3,571					3,571
Net actuarial gains (losses) and prior service costs	(12,197)						(12,197)
Amortization of prior service costs and net gains or losses	11,359						11,359
Cash dividends declared	(216,049)		(216,049)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures		131,354
Share Based Compensation Expense, Value	5,402	$ 5,402
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation		(39,217)
Tredegar common stock purchased by trust for savings restoration plan	0		495	(495)
Balance at Dec. 31, 2020	109,055	$ 50,066	$ 239,480	$ (2,087)	(84,149)	$ 2,264	$ (96,519)
Balance, shares at Dec. 31, 2020		33,457,176
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Payment, Tax Withholding, Share-based Payment Arrangement	(850)	$ (850)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	$ 25,295				$ 25,295