Taxes (Details Textual)	3 Months Ended				12 Months Ended
	Oct. 02, 2011	Oct. 03, 2010 USD ($)	Oct. 03, 2010 JPY (¥)	Mar. 31, 2009 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)	Dec. 31, 2008 USD ($)	Dec. 31, 2011 Alternative Minimum [Member] USD ($)	Dec. 31, 2011 Foreign Country [Member] USD ($)	Dec. 31, 2011 Research [Member] USD ($)	Dec. 31, 2011 State Research and Experimentation [Member] USD ($)
Tax Credit Carryforward [Line Items]
Tax credits									$ 2,200,000	$ 6,077,000		$ 3,997,000
Valuation allowance										2,457,000	570,000
Taxes (Textual) [Abstract]
Domestic income (loss) from continuing operations before taxes					24,836,000	19,424,000	(5,555,000)
Foreign income (loss) from continuing operations before taxes					62,281,000	56,679,000	(4,821,000)
Increase (decrease) in tax expense upon the expiration of the statutes of limitation for certain reserves for income tax uncertainties					(808,000)	(105,000)	(3,150,000)
Increase (decrease) in tax expense for the finalization of advanced pricing agreement					(155,000)
Increase (decrease) in tax expense for the final true-up of the prior year's tax accrual upon filing the actual tax returns					574,000	(151,000)	(51,000)
Increase (decrease) in tax expense from write down of noncurrent deferred tax asset					201,000
Increase (decrease) in interest and penalties					(2,000)	(228,000)	(325,000)
Increase (decrease) in tax expense of due to the settlement of the competent Authority tax case with Japan						(462,000)
Increase (decrease) in tax expense from the receipt of state refund						(124,000)	(406,000)
Increase (decrease) in expense related to foreign tax credit valuation allowance							72,000
Provision for effective tax rate					20.00%	19.00%	(53.00%)
Effective discrete tax rate					20.00%	20.00%	(19.00%)
Interest and penalties, gross					1,206,000	1,180,000
Reserve for income taxes, total					5,354,000	5,361,000
Reserve for income taxes, current					558,000
Reserve for income taxes, noncurrent					4,796,000	5,361,000
Minimum decrease in income tax expense due to release in reserves					300,000
Maximum decrease in income tax expense due to release in reserves					500,000
Tax years open to examination by various taxing authorities					2007 through 2010
Company's deposit returned with interest.		9,336,000	766,257,300
Tax years covered through Advanced Pricing Agreement	2006 through 2011
Alternative minimum tax credits unlimited life and the foreign tax credits					between 2018 and 2021
Valuation allowance										2,457,000	570,000
Establishment of Deferred Tax Assets for Capital Loss Carryforwards					373,000	373,000		373,000
Recognized a deferred tax asset					609,000	655,000
Non deductible federal and state liabilities					6,244,000	7,543,000
Valuation allowance for the tax effect of capital loss					2,522,000	373,000		373,000
Income from expiration of the statute of limitations relating to a tax				2,003,000
Income tax paid net					18,389,000	8,019,000	2,242,000
Amount paid to conclude the Japan competent authority case						$ 2,526,000