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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables) | 12 Months Ended
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Dec. 31, 2019
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] |
Schedule of components of accumulated other comprehensive income (loss), net of tax | The components of accumulated other comprehensive income (loss), net of tax, are as follows (dollar amounts in thousands):
|  | Foreign Currency Translation Adjustments |  | Net Unrealized Gains (Losses) On Available-For-Sale Securities |  | Write-off of cumulative translation adjustments |  | Total Accumulated Other Comprehensive Loss
Balance as of December 31, 2017 |  | $ | (10,134) |  |  | $ | 2 |  |  | $ | — |  |  |  | $ | (10,132) |
Activity, net of tax |  | (973) |  |  | (2) |  |  | — |  |  |  | (975) |
Balance as of December 31, 2018 |  | (11,107) |  |  | — |  |  | — |  |  |  | (11,107) |
Activity, net of tax |  | 477 |  |  | — |  |  | (595) |  |  |  | (118) |
Balance as of December 31, 2019 |  | $ | (10,630) |  |  | — |  |  | $ | (595) |  |  |  | $ | (11,225) |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: 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=118930883&loc=SL7669686-108580 + Details
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