Borrowing Arrangements (Short-Term Debt) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Short-term Debt [Line Items]
Short-term debt	$ 22,894	$ 21,442
Borrowings Under Japanese Credit Facility [Member]
Short-term Debt [Line Items]
Short-term debt		2,962
Borrowings Under Japanese Working Capital Loan [Member]
Short-term Debt [Line Items]
Short-term debt	$ 22,894	$ 18,480