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Financial Derivatives and Hedging Activities (Details 1) (Not designated as hedging [Member], Forward foreign currency exchange contracts [Member]) In Thousands, unless otherwise specified | Dec. 31, 2012 Euro / U.S. dollar [Member] EUR (€) | Dec. 31, 2011 Euro / U.S. dollar [Member] EUR (€) | Dec. 31, 2012 Euro / British Pound [Member] EUR (€) | Dec. 31, 2012 Canadian dollar/U.S. dollar [Member] USD ($) | Dec. 31, 2012 U.S Dollar / Euro [Member] USD ($) | Dec. 31, 2011 Philippine Peso / U.S. dollar [Member] PHP
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Sell / Buy |  |  |  |  |  |
Sell Notional | € 13,000 | € 25,500 | € 4,000 | $ 2,000 | $ 2,000 | 150,000

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- Definition Aggregate notional amount of foreign currency exchange rate derivatives. Notional amount refers to the number of currency units specified in the foreign currency derivative contract. + References 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 + Details
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