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Accumulated Other Comprehensive Loss (Tables) | 12 Months Ended
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Dec. 31, 2017
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | The following table summarizes the changes in accumulated balances of other comprehensive loss (in thousands):
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Beginning balance | $ | (3,787 | ) |  | $ | (3,908 | ) |  | $ | (2,602 | )
Other comprehensive income (loss) due to foreign currency translation, net of tax | 190 |  |  | 121 |  |  | (1,306 | )
Ending balance | $ | (3,597 | ) |  | $ | (3,787 | ) |  | $ | (3,908 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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