Financial Instruments and Risk Management (Gross Notional Amount of Outstanding Derivatives) (Details) (Forward Contracts [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Forward Contracts [Member]
Derivatives, Fair Value [Line Items]
Currency forward contracts designated as cash flow hedges	$ 70,000	$ 144,000
Currency forward contracts not designated as cash flow hedges	$ 121,934	$ 138,807

Aggregate notional amount of all derivatives not designated as a hedging instrument. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

Name:	us-gaap_NotionalAmountOfOtherDerivativesNotDesignatedAsHedgingInstruments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant