Income Taxes (Details 3) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax [Line Items]
Deferred income tax expense (benefit), exclusive of the effects of other components listed below	$ (546)	$ 732	$ (669)
Tax expenses of unrealized foreign exchange gain	512	2,142	46
Tax expenses (benefits) of allowance for doubtful accounts	2,304	(57)	15
Tax expenses of used investment tax credits	3,337	1,431	5,985
Tax expenses (benefits) of advanced share-based compensation deductions	(1,459)	(432)	2,032
Deferred Income Tax Expense (Benefit)	$ 4,148	$ 3,816	$ 7,409

No definition available.

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Amount of deferred tax expense from write-off of the deferred tax asset related to deductible stock options at exercise.

+ References

No definition available.

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Amount of deferred foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of deferred income tax expense (benefit) and income tax credits.

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The amount deducted from an entities' taxes, reflecting a percentage of an amount invested in certain assets spread over the useful life of those assets; includes deferred investment tax credits.

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The portion of the noncash component of income tax expense for the period other than the portion from the net change in the entity's deferred tax assets and liabilities.

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