Debt and Commitments (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Apr. 05, 2011 Convertible Debt [Member] 3.75% Convertible Notes [Member]	Dec. 31, 2012 Convertible Debt [Member] 3.375% Convertible Notes [Member]	Dec. 31, 2011 Convertible Debt [Member] 3.375% Convertible Notes [Member]	Dec. 31, 2012 Revolving Credit Agreement [Member]	Dec. 31, 2011 Revolving Credit Agreement [Member]	Dec. 31, 2012 Borrowings Under Lines of Credit and Overdrafts [Member]	Dec. 31, 2011 Borrowings Under Lines of Credit and Overdrafts [Member]	Dec. 31, 2012 Foreign Bank Borrowings [Member]	Dec. 31, 2011 Foreign Bank Borrowings [Member]	Dec. 31, 2012 Other Debt Obligations [Member]	Dec. 31, 2011 Other Debt Obligations [Member]
Debt Instrument [Line Items]
Long-Term Debt, Gross			$ 92,500	$ 55,636	$ 55,636	$ 589,200	$ 281,900			$ 945	$ 1,485	$ 574	$ 0
Debt Instrument, Fair Value Disclosure	662,050	343,332		57,977	59,038	599,172	270,288	3,380	12,364	947	1,642	574	0
Unamortized debt discount				(3,122)	(5,333)
Borrowings under lines of credit and overdrafts	3,795	12,364						3,380	12,364
Total debt, net of unamortized discounts	646,613	346,052		52,514	50,303
Less current maturities	(4,494)	(12,904)
Long-term debt	$ 642,119	$ 333,148