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Cash, Cash Equivalents, and Restricted Cash (Tables) | 12 Months Ended
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Dec. 31, 2020
Cash and Cash Equivalents [Abstract] |
Details of Cash, Cash Equivalents, and Restricted Cash |
|  | December 31 |
|  | 2019 |  |  | 2020 |
|  | US$ |  |  | US$ |
Cash |  |  | 61,184 |  |  |  | 54,947 |
Time deposits |  |  | 229,419 |  |  |  | 265,936 |
Repurchase agreements |  |  | 32,563 |  |  |  | 22,078 |
Total cash and cash equivalents |  |  | 323,166 |  |  |  | 342,961 |
Restricted cash |  |  | 25,087 |  |  |  | 26,250 |
|  |  | 348,253 |  |  |  | 369,211 |

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- Definition Tabular disclosure of the components of cash and cash equivalents. + References No definition available. + Details
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