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Income Taxes Income Taxes - Foreign Rate Differentials (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Tax Foreign Rate Differential [Line Items] |  |  |
Income (Loss) from Continuing Operations before Income Taxes, Foreign | $ 46,391 | $ 67,183 | $ 55,613
CAYMAN ISLANDS |  |  |
Income Tax Foreign Rate Differential [Line Items] |  |  |
Income (Loss) from Continuing Operations before Income Taxes, Foreign | $ 39,954 | 58,169 | 50,993
statutorytaxrate | 0.00% |  |
Hong Kong |  |  |
Income Tax Foreign Rate Differential [Line Items] |  |  |
Income (Loss) from Continuing Operations before Income Taxes, Foreign | $ 3,315 | 3,992 | 2,645
statutorytaxrate | 16.50% |  |
China |  |  |
Income Tax Foreign Rate Differential [Line Items] |  |  |
Income (Loss) from Continuing Operations before Income Taxes, Foreign | $ 2,584 | $ 3,855 | $ 1,493
statutorytaxrate | 25.00% |  |

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- Definition Statutory tax rate of foreign subsidiary. + References No definition available. + Details
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- Definition The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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