Bank Credit Agreements and Other Short-Term and Long-Term Debt (Long Term Debt) (Details) In Thousands, unless otherwise specified			12 Months Ended			12 Months Ended				12 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2013 Notes Payable To Bank 1 [Member] USD ($)	Dec. 31, 2013 Notes Payable To Bank 1 [Member] TWD	Dec. 31, 2012 Notes Payable To Bank 1 [Member] USD ($)	Dec. 31, 2013 Notes Payable To Bank 2 [Member] USD ($)	Dec. 31, 2012 Notes Payable To Bank 2 [Member] USD ($)	Dec. 31, 2013 Revolver [Member] USD ($)	Dec. 31, 2012 Revolver [Member] USD ($)	Dec. 31, 2013 Term Loan [Member] USD ($)	Dec. 31, 2012 Term Loan [Member] USD ($)
Long-term debt by current and noncurrent [Abstract]
Total long-term debt	$ 183,926	$ 45,194
Current portion of long-term debt	(1,127)	(1,063)
LONG-TERM DEBT, net of current portion	182,799	44,131
Debt Instrument [Line Items]
Debt Instrument, Interest Rate Terms										bore interest at a rate per annum equal to the Eurocurrency Rate (as defined) plus 1.25% per annum
Long-term Debt, Gross			$ 2,500	158,000	$ 2,979	$ 2,426	$ 2,215	$ 179,000	$ 0	$ 0	$ 40,000
Long-term variable interest rate			2.05%	2.05%	3.30%	2.50%
Debt Instrument, Maturity Date, Description			TWD 132 million matures on July 6, 2021, and TWD 26 million matured July 6, 2013	TWD 132 million matures on July 6, 2021, and TWD 26 million matured July 6, 2013		Maturity dates range from 2013 to 2023