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Accumulated Other Comprehensive Income ("AOCI") (Tables) | 12 Months Ended
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Dec. 31, 2020
Equity [Abstract] |
Summary of Total Changes in AOCI by Component, Net of Tax | The following tables set forth the total changes in AOCI by component, net of tax:
|  | Year Ended December 31, 2020 |  |  | Year Ended December 31, 2019 |
|  |  |  |  |  | Cumulative |  |  |  |  |  |  |  |  |  |  | Cumulative |  |  |  |  |
|  | Unrecognized |  |  | Translation |  |  |  |  |  |  | Unrecognized |  |  | Translation |  |  |  |  |
|  | Benefit Cost |  |  | Adjustment |  |  | Total |  |  | Benefit Cost |  |  | Adjustment |  |  | Total |
Balance at January 1 |  | $ | (5,671 | ) |  | $ | (51,682 | ) |  | $ | (57,353 | ) |  | $ | (5,873 | ) |  | $ | (53,710 | ) |  | $ | (59,583 | )
Other comprehensive income before reclassifications: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on foreign currency translation adjustment |  |  | 0 |  |  |  | 3,835 |  |  |  | 3,835 |  |  |  | 0 |  |  |  | 2,028 |  |  |  | 2,028 |
Loss on unfunded pension obligations |  |  | (1,396 | ) |  |  | 0 |  |  |  | (1,396 | ) |  |  | (195 | ) |  |  | 0 |  |  |  | (195 | )
Amounts reclassified from AOCI: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of defined benefit pension actuarial loss (a) |  |  | 363 |  |  |  | 0 |  |  |  | 363 |  |  |  | 397 |  |  |  | 0 |  |  |  | 397 |
Net current period other comprehensive income (loss) |  |  | (1,033 | ) |  |  | 3,835 |  |  |  | 2,802 |  |  |  | 202 |  |  |  | 2,028 |  |  |  | 2,230 |
Balance at December 31 |  | $ | (6,704 | ) |  | $ | (47,847 | ) |  | $ | (54,551 | ) |  | $ | (5,671 | ) |  | $ | (51,682 | ) |  | $ | (57,353 | )
(a) | This AOCI component is included in the computation of net periodic pension costs as noted in Note C – Pension Plans.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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