Subsequent Events (Term Loan) (Details)				12 Months Ended
	Dec. 31, 2011 USD ($)	Dec. 31, 2011 TWD	Dec. 31, 2010 USD ($)	Dec. 31, 2011 Fifth Amendment [Member] USD ($)
Debt Instrument [Line Items]
Term Loan, Issuance Date				February 1, 2012
Term Loan Face Amount	$ 0		$ 134,293,000	$ 40,000,000
Term Loan, Maturity Date				Jan. 17, 2015
Line of Credit facility, Interest Rate Terms				modifies the provisions for the Eurocurrency Rate by allowing for Interest Periods of 30, 60 or 90 days, rather than requiring all Eurocurrency Rate determinations to be on Interest Periods of one month, and by reducing the interest rate for Eurocurrency Rate committed loans from the Eurocurrency Rate plus 3.0% to the Eurocurrency Rate plus 2.5%. bears interest at a rate per annum equal to the Eurocurrency Rate plus 1.25% per annum
Term Loan, Outstanding		158,000,000		$ 40,000,000