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Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2018
Changes in Accumulated Other Comprehensive Income (Loss) | Changes in accumulated other comprehensive income (loss) consisted of the following for the years ended December 31, 2018 and 2017:
|  |  |  |  | Changes in |  |  |  |
|  | Foreign |  |  | Fair Value of |  |  | Accumulated |
|  | Currency |  |  | Available- |  |  | Other |
|  | Translation |  |  | for-Sale |  |  | Comprehensive |
|  | Adjustment |  |  | Investments |  |  | Loss |
|  | (Amounts in thousands) |
Balance as of December 31, 2016 |  | $ | (13,744 | ) |  | $ | (5 | ) |  | $ | (13,749 | )
Other comprehensive loss |  |  | 7,381 |  |  |  | 5 |  |  |  | 7,386 |
Balance as of December 31, 2017 |  |  | (6,363 | ) |  |  | — |  |  |  | (6,363 | )
Other comprehensive loss |  |  | (5,530 | ) |  |  | — |  |  |  | (5,530 | )
Balance as of December 31, 2018 |  | $ | (11,893 | ) |  | $ | — |  |  | $ | (11,893 | )

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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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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
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Period Type: | duration