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Accumulated Other Comprehensive Loss (Tables) | 6 Months Ended
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Jun. 30, 2018
Equity [Abstract] |
Schedule of Components of Accumulated Other Comprehensive Loss | The components of accumulated other comprehensive loss are as follows (in thousands):
|  |  |  |  |  |  |  |  |  | Total |
|  | Net Unrealized |  |  | Cumulative |  |  | Accumulated |
|  | Loss on Marketable |  |  | Translation |  |  | Other Comprehensive |
|  | Investments |  |  | Adjustment |  |  | Loss |
Balance at January 1, 2018 |  | $ | (115 | ) |  | $ | (1,897 | ) |  | $ | (2,012 | )
Reclassification of stranded tax effects from tax reform |  |  | (26 | ) |  |  | — |  |  |  | (26 | )
Foreign currency translation |  |  | — |  |  |  | (1,691 | ) |  |  | (1,691 | )
Unrealized loss on investments, net of tax of $(17) |  |  | (53 | ) |  |  | — |  |  |  | (53 | )
Balance at June 30, 2018 |  | $ | (194 | ) |  | $ | (3,588 | ) |  | $ | (3,782 | )
|  |  |  |  |  |  |  |  |  | Total |
|  | Net Unrealized |  |  | Cumulative |  |  | Accumulated |
|  | Loss on Marketable |  |  | Translation |  |  | Other Comprehensive |
|  | Investments |  |  | Adjustment |  |  | Loss |
Balance at January 1, 2017 |  | $ | (83 | ) |  | $ | (7,490 | ) |  | $ | (7,573 | )
Foreign currency translation |  |  | — |  |  |  | 3,304 |  |  |  | 3,304 |
Unrealized gain on investments, net of tax of $15 |  |  | 24 |  |  |  | — |  |  |  | 24 |
Balance at June 30, 2017 |  | $ | (59 | ) |  | $ | (4,186 | ) |  | $ | (4,245 | )
|  |  |  |  |  |  |  |  |  | Total |
|  | Net Unrealized |  |  | Cumulative |  |  | Accumulated |
|  | Loss on Marketable |  |  | Translation |  |  | Other Comprehensive |
|  | Investments |  |  | Adjustment |  |  | Loss |
Balance at April 1, 2018 |  | $ | (256 | ) |  | $ | (194 | ) |  | $ | (450 | )
Foreign currency translation |  |  | — |  |  |  | (3,394 | ) |  |  | (3,394 | )
Unrealized gain on investments, net of tax of $21 |  |  | 62 |  |  |  | — |  |  |  | 62 |
Balance at June 30, 2018 |  | $ | (194 | ) |  | $ | (3,588 | ) |  | $ | (3,782 | )
|  |  |  |  |  |  |  |  |  | Total |
|  | Net Unrealized |  |  | Cumulative |  |  | Accumulated |
|  | Loss on Marketable |  |  | Translation |  |  | Other Comprehensive |
|  | Investments |  |  | Adjustment |  |  | Loss |
Balance at April 1, 2017 |  | $ | (66 | ) |  | $ | (6,700 | ) |  | $ | (6,766 | )
Foreign currency translation |  |  | — |  |  |  | 2,514 |  |  |  | 2,514 |
Unrealized gain on investments, net of tax of $4 |  |  | 7 |  |  |  | — |  |  |  | 7 |
Balance at June 30, 2017 |  | $ | (59 | ) |  | $ | (4,186 | ) |  | $ | (4,245 | )

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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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