Income Tax Provision (Details) (USD $)	3 Months Ended	12 Months Ended
Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Income Tax Provision [Abstract]
Income tax expense	$ 6,574,000	$ 618,000
Effective tax rate	153.00%	10.00%	16.00%
Domestic pre-tax income	(6,000,000)
Foreign pre-tax income	10,000,000
Tax holidays	1,000,000	2,000,000
Tax holidays basic EPS	$ 0.03	$ 0.04
Tax holidays diluted EPS	$ 0.03	$ 0.04
Unrecognized tax benefits	28,000,000
Estimated Annual Income Tax Rate Continuing Operations	18.00%
Income Tax Examination, Description	During 2012, the China government began an audit of the Company’s High and New Technology Enterprise (“HNTE”) status for its largest Chinese subsidiary for 2009-2011 as part of an overall evaluation of the reduced tax rates provided to many high tech companies. This subsidiary has a reduced tax rate of 15%. In April 2013, the Company was notified by the China government that they had completed their tax audit and had concluded that the Company owed additional tax related to tax year 2011 in the amount of $5 million. This subsidiary has been approved for its HNTE status for the tax years 2012-2014.
Income Tax Examination, Additional Tax from Examination	$ 5,000,000

The estimated annual tax rate for current tax year.

No definition available.

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The amount of income taxes per basic share from which a reporting entity is exempt or for which it will receive a reduction in income taxes as a result of the income tax holiday granted by the taxing jurisdiction.

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The amount of income taxes per diluted share from which a reporting entity is exempt or for which it will receive a reduction in income taxes as a result of the income tax holiday granted by the taxing jurisdiction.

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A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

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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.

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A brief description of status of the tax examination, significant findings to date, and the entity's position with respect to the findings.

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The amount of penalty expense recorded in the period based upon the specified tax examination.

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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The amount of income taxes from which a reporting entity is exempt or for which it will receive a reduction in income taxes as a result of the income tax holiday granted by the taxing jurisdiction.

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The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

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