Debt (Details) (USD $) In Thousands, unless otherwise specified													9 Months Ended		9 Months Ended				9 Months Ended		9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Convertible Debt [Member] 3.375% Convertible Notes [Member]	Dec. 31, 2011 Convertible Debt [Member] 3.375% Convertible Notes [Member]	Sep. 30, 2012 Revolving Credit Agreement [Member]	Jul. 10, 2012 Revolving Credit Agreement [Member]	Jun. 30, 2012 Revolving Credit Agreement [Member]	Dec. 31, 2011 Revolving Credit Agreement [Member]	Sep. 30, 2012 Lines of Credit and Overdrafts [Member]	Dec. 31, 2011 Lines of Credit and Overdrafts [Member]	Sep. 30, 2012 Foreign Bank Borrowings [Member]	Dec. 31, 2011 Foreign Bank Borrowings [Member]	Sep. 30, 2012 Lines of Credit [Member]	Dec. 31, 2011 Lines of Credit [Member]	Sep. 30, 2012 Bank Overdrafts [Member]	Dec. 31, 2011 Bank Overdrafts [Member]	Sep. 30, 2012 Other Debt Obligations [Member]	Dec. 31, 2011 Other Debt Obligations [Member]	Sep. 30, 2012 Minimum [Member]	Sep. 30, 2012 Minimum [Member] Revolving Credit Agreement [Member]	Sep. 30, 2012 Maximum [Member]	Sep. 30, 2012 Maximum [Member] Revolving Credit Agreement [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross			$ 55,636	$ 55,636	$ 625,400			$ 281,900			$ 1,080	$ 1,485					$ 576	$ 0
Debt Instrument, Fair Value Disclosure	696,104	343,332	60,239	59,038	626,534			270,288	7,675	12,364	1,080	1,642					576	0
Debt Instrument, Unamortized Discount			(3,692)	(5,333)
Borrowings under lines of credit and overdrafts	8,085	12,364							7,675	12,364			7,500	12,000	175	364
Total debt, net of unamortized discounts	686,675	346,052
Less current maturities	(8,625)	(12,904)
Long-term debt	678,050	333,148
Convertible notes stated interest rate			3.375%
Line of credit facility, accordian feature amount						250,000
Line of credit facility, maximum borrowing capacity					$ 750,000		$ 500,000						$ 15,000
Debt instrument basis spread on LIBOR																				1.10%		1.70%
Line of Credit Facility, Interest Rate at Period End													2.16%	2.17%
Repayment period													7 days		2 days
Maturity of bank acceptances																			3 months		6 months