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Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2020
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Summary of accumulated other comprehensive income (loss) | The changes in accumulated other comprehensive income (loss) for the years ended December 31, 2020, 2019 and 2018 were as follows:
|  | Foreign Currency Translation Adjustments |  |  | Derivative Financial Instruments Designated as Cash Flow Hedges |  |  | Total |
(in thousands) |  |  |  |  |  |  |  |  |
Balance at December 31, 2017 |  | $ | 10 |  |  | $ | 7 |  |  | $ | 17 |
Gain (loss) arising during the period |  |  | (207 | ) |  |  | 98 |  |  |  | (109 | )
Reclassification to earnings for (loss) realized |  |  | — |  |  |  | (2 | ) |  |  | (2 | )
Income tax (expense) |  |  | — |  |  |  | (25 | ) |  |  | (25 | )
Net other comprehensive income (loss) – year 2018 |  |  | (207 | ) |  |  | 71 |  |  |  | (136 | )
Balance at December 31, 2018 |  | $ | (197 | ) |  | $ | 78 |  |  | $ | (119 | )
(Loss) arising during the period |  |  | (129 | ) |  |  | (181 | ) |  |  | (310 | )
Reclassification to earnings for gains realized |  |  | — |  |  |  | 32 |  |  |  | 32 |
Income tax benefit |  |  | — |  |  |  | 39 |  |  |  | 39 |
Net other comprehensive (loss) – year 2019 |  |  | (129 | ) |  |  | (110 | ) |  |  | (239 | )
Balance at December 31, 2019 |  | $ | (326 | ) |  | $ | (32 | ) |  | $ | (358 | )
(Loss) arising during the period |  |  | (187 | ) |  |  | (113 | ) |  |  | (300 | )
Reclassification to earnings for gains realized |  |  | — |  |  |  | 121 |  |  |  | 121 |
Income tax (expense) |  |  | — |  |  |  | (2 | ) |  |  | (2 | )
Net other comprehensive income (loss) – year 2020 |  |  | (187 | ) |  |  | 6 |  |  |  | (181 | )
Balance at December 31, 2020 |  | $ | (513 | ) |  | $ | (26 | ) |  | $ | (539 | )

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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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