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Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Earnings before income taxes	$ 65,886	$ 16,808	$ 35,294
Taiwan Operations [Member]
Earnings before income taxes	73,461	22,370	42,550
Cayman Operations [Member]
Earnings before income taxes	(7,395)	(7,038)	(7,535)
Us Operations [Member]
Earnings before income taxes	(1,597)	151	(55)
China Operations [Member]
Earnings before income taxes	1,388	1,293	157
Korea Operations [Member]
Earnings before income taxes	$ 29	$ 32	$ 177

X

- Definition

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 10

-Article 5

+ Details

Name:	us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration