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Shareholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2016
Cash Dividends Declared Per Ordinary Share | The Company declared cash dividends per ordinary share during the periods presented as follows:
|  | 2015 |  |  | 2016 |
|  | Dividends Per Share (US$) |  |  | Amount (in US$ thousands) |  |  | Dividends Per Share (US$) |  |  | Amount (in US$ thousands) |
First quarter |  | $ | 0.0375 |  |  | $ | 5,156 |  |  | $ | 0.0375 |  |  | $ | 5,290 |
Second quarter |  | $ | 0.0375 |  |  |  | 5,166 |  |  | $ | 0.0375 |  |  |  | 5,290 |
Third quarter |  | $ | 0.0375 |  |  |  | 5,230 |  |  | $ | 0.0375 |  |  |  | 5,297 |
Fourth quarter |  | $ | 0.0375 |  |  |  | 5,232 |  |  | $ | 0.0500 |  |  |  | 7,065 |
|  |  |  |  |  | $ | 20,784 |  |  |  |  |  |  |  | 22,942 |

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- Definition Tabular disclosure of information related to dividends declared, including paid and unpaid dividends. + References No definition available. + Details
Name: | us-gaap_DividendsDeclaredTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration