Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Income Taxes (Textuals) [Abstract]
Income tax expense	$ 2,499,000	$ 10,321,000	$ 9,475,000	$ 8,954,000
Income tax expense of foreign operations			4,700,000
Expense related to foreign withholding taxes			1,600,000
Gross unrecognized tax benefits	9,600,000		9,600,000		10,500,000
Amount unrecognized tax benefits will decrease by within the next twelve months	7,900,000		7,900,000
Settlement of an uncertain position offset			1,000,000
Increase in reserve resulting from evaluation			100,000
U.S. [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	393,700,000		393,700,000
Operating loss carryforwards, expiration dates			at various times through 2031
Non-U.S. [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	78,500,000		78,500,000
Operating loss carryforwards, expiration dates			at various times through 2021
J-Devices [Member]
Operating Loss Carryforwards [Line Items]
Deferred taxes on investment			2,900,000
State Income Taxes [Member]
Operating Loss Carryforwards [Line Items]
Deferred taxes on investment on state income taxes			$ 300,000