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Accumulated Other Comprehensive Income (Loss) | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
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, 2021:
(In thousands) | Foreign currency translation adjustment |  | Gain (loss) on derivative financial instruments |  | Pension and other post-retirement benefit adjustments |  | Total
Beginning balance, January 1, 2021 | $ | (84,149) |  |  | $ | 2,264 |  |  | $ | (96,519) |  |  | $ | (178,404) |
Other comprehensive income (loss) before reclassifications | (2,648) |  |  | 273 |  |  | — |  |  | (2,375) |
Amounts reclassified from accumulated other comprehensive income (loss) | — |  |  | (509) |  |  | 3,319 |  |  | 2,810 |
Net other comprehensive income (loss) - current period | (2,648) |  |  | (236) |  |  | 3,319 |  |  | 435 |
Ending balance, March 31, 2021 | $ | (86,797) |  |  | $ | 2,028 |  |  | $ | (93,200) |  |  | $ | (177,969) |
The following table summarizes the after-tax changes in accumulated other comprehensive income (loss) for the three months ended March 31, 2020:
(In thousands) | Foreign currency translation adjustment |  | Gain (loss) on derivative financial instruments |  | Pension and other post-retirement benefit adjustments |  | Total
Beginning balance, January 1, 2020 | $ | (100,663) |  |  | $ | (1,307) |  |  | $ | (95,681) |  |  | $ | (197,651) |
Other comprehensive income (loss) before reclassifications | (11,529) |  |  | (4,888) |  |  | — |  |  | (16,417) |
Amounts reclassified from accumulated other comprehensive income (loss) | — |  |  | 1,113 |  |  | 2,931 |  |  | 4,044 |
Net other comprehensive income (loss) - current period | (11,529) |  |  | (3,775) |  |  | 2,931 |  |  | (12,373) |
Ending balance, March 31, 2020 | $ | (112,192) |  |  | $ | (5,082) |  |  | $ | (92,750) |  |  | $ | (210,024) |
Reclassifications of balances out of accumulated other comprehensive income (loss) into net income (loss) for the three months ended March 31, 2021 are summarized as follows:
(In thousands) | Amount reclassified from other comprehensive income (loss) |  | Location of gain (loss) reclassified from accumulated other comprehensive income (loss) to net income (loss)
Gain (loss) on derivative financial instruments: |  |  |
Aluminum future contracts, before taxes | $ | 640 |  |  | Cost of sales
Foreign currency forward contracts, before taxes | (2) |  |  | Selling, general & administrative
Foreign currency forward contracts, before taxes | 17 |  |  | Cost of sales
Total, before taxes | 655 |  |  |
Income tax expense (benefit) | 146 |  |  | Income tax expense (benefit)
Total, net of tax | $ | 509 |  |  |
Amortization of pension and other post-retirement benefits: |  |  |
Actuarial gain (loss) and prior service costs, before taxes | $ | (4,243) |  |  | (a)
Income tax expense (benefit) | (924) |  |  | Income tax expense (benefit)
Total, net of tax | $ | (3,319) |  |  |
(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, 2020 are summarized as follows:
(In thousands) | Amount reclassified from other comprehensive income (loss) |  | Location of gain (loss) reclassified from accumulated other comprehensive income (loss) to net income (loss)
Gain (loss) on derivative financial instruments: |  |  |
Aluminum future contracts, before taxes | $ | (640) |  |  | Cost of sales
Foreign currency forward contracts, before taxes | (794) |  |  | Selling, general & administrative
Foreign currency forward contracts, before taxes | 15 |  |  | Cost of sales
Total, before taxes | (1,419) |  |  |
Income tax expense (benefit) | (306) |  |  | Income tax expense (benefit)
Total, net of tax | $ | (1,113) |  |  |
Amortization of pension and other post-retirement benefits: |  |  |
Actuarial gain (loss) and prior service costs, before taxes | $ | (3,767) |  |  | (a)
Income tax expense (benefit) | (836) |  |  | Income tax expense (benefit)
Total, net of tax | $ | (2,931) |  |  |
(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, 2021:
(In thousands) | Foreign currency translation adjustment |  | Gain (loss) on derivative financial instruments |  | Pension and other post-retirement benefit adjustments |  | Total
Beginning balance, January 1, 2021 | $ | (84,149) |  |  | $ | 2,264 |  |  | $ | (96,519) |  |  | $ | (178,404) |
Other comprehensive income (loss) before reclassifications | (2,648) |  |  | 273 |  |  | — |  |  | (2,375) |
Amounts reclassified from accumulated other comprehensive income (loss) | — |  |  | (509) |  |  | 3,319 |  |  | 2,810 |
Net other comprehensive income (loss) - current period | (2,648) |  |  | (236) |  |  | 3,319 |  |  | 435 |
Ending balance, March 31, 2021 | $ | (86,797) |  |  | $ | 2,028 |  |  | $ | (93,200) |  |  | $ | (177,969) |
| The following table summarizes the after-tax changes in accumulated other comprehensive income (loss) for the three months ended March 31, 2020:
(In thousands) | Foreign currency translation adjustment |  | Gain (loss) on derivative financial instruments |  | Pension and other post-retirement benefit adjustments |  | Total
Beginning balance, January 1, 2020 | $ | (100,663) |  |  | $ | (1,307) |  |  | $ | (95,681) |  |  | $ | (197,651) |
Other comprehensive income (loss) before reclassifications | (11,529) |  |  | (4,888) |  |  | — |  |  | (16,417) |
Amounts reclassified from accumulated other comprehensive income (loss) | — |  |  | 1,113 |  |  | 2,931 |  |  | 4,044 |
Net other comprehensive income (loss) - current period | (11,529) |  |  | (3,775) |  |  | 2,931 |  |  | (12,373) |
Ending balance, March 31, 2020 | $ | (112,192) |  |  | $ | (5,082) |  |  | $ | (92,750) |  |  | $ | (210,024) |

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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