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v3.20.1

Consolidated Statements Of Shareholders' Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Retained Earnings | Trust For Savings Restoration Plan | Foreign Currency Translation | Gain (Loss) On Derivative Financial Instruments | Pension and other post-retirement benefit adjustments | Corporation [Member] | Corporation [Member] Common Stock [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2016 | $ 310,783 | $ 32,007 | $ 463,507 | $ (1,497) | $ (93,970) | $ 863 | $ (90,127) |  |
Balance, shares at Dec. 31, 2016 |  | 32,933,807 |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Net income | 38,251 |  | 38,251 |  |  |  |  |  |
Foreign currency translation adjustment | 7,792 |  |  |  | 7,792 |  |  |  |
Derivative financial instruments adjustment | (404) |  |  |  |  | (404) |  |  |
Net actuarial gains (losses) and prior service costs | (8,634) |  |  |  |  |  | (8,634) |  |
Amortization of prior service costs and net gains or losses | 7,811 |  |  |  |  |  | 7,811 |  |
Cash dividends declared | (14,532) |  | (14,532) |  |  |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures |  | 49,475 |  |  |  |  |  |  |
Share Based Compensation Expense, Value |  | $ 2,018 |  |  |  |  |  |  |
Issued upon exercise of stock options & other | $ (124) | $ 819 |  |  |  |  |  | $ (124) | $ 819
Issued upon exercise of stock options (including related income tax benefits) & other, shares | (7,125) | 41,265 |  |  |  |  |  |  |
Cumulative effect adjustment for adoption of stock-based compensation accounting guidance | $ 0 | $ 27 |  |  |  |  |  |  | (27)
Shares received from the sale of Falling Springs, LLC, shares |  | 0 |  |  |  |  |  |  |
Tredegar common stock purchased by trust for savings restoration plan | 0 |  | 31 | (31) |  |  |  |  |
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 | 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 |  |  |  |  |  |  |
Issued upon exercise of stock options & other | $ (328) | $ 1,332 |  |  |  |  |  | (328) | 1,332
Issued upon exercise of stock options (including related income tax benefits) & other, shares | (17,558) | 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] |  |  |  |  |  |  |  |  |
Net income | 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 |  |  |  |  |  |  |
Issued upon exercise of stock options & other | $ (854) | $ 184 |  |  |  |  |  | $ (854) | $ 184
Issued upon exercise of stock options (including related income tax benefits) & other, shares | (49,444) | 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 |  |  |  |  |  |  |

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