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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables) | 12 Months Ended
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Dec. 31, 2018
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 |  | Total Accumulated Other Comprehensive Loss
Balance as of January 1, 2016 | $ | (11,231 | ) |  | $ | (12 | ) |  | $ | (11,243 | )
Activity, net of tax | (16 | ) |  | (1 | ) |  | (17 | )
Balance as of December 31, 2016 | (11,247 | ) |  | (13 | ) |  | (11,260 | )
Activity, net of tax | 1,113 |  |  | 15 |  |  | 1,128 |
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 | )

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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=114867106&loc=SL7669686-108580 + Details
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