Financial Derivatives and Hedging Activities (Details 1) (Not designated as hedging [Member], Forward foreign currency exchange contracts [Member]) In Thousands, unless otherwise specified	Sep. 30, 2012 Euro / U.S. dollar [Member] EUR (€)	Dec. 31, 2011 Euro / U.S. dollar [Member] EUR (€)	Sep. 30, 2012 Euro / British Pound [Member] EUR (€)	Sep. 30, 2012 U.S. dollar / Canadian dollar [Member] CAD	Dec. 31, 2011 Philippine Peso / U.S. dollar [Member] PHP
Sell / Buy
Sell Notional	€ 18,000	€ 25,500	€ 4,000	1,000	150,000

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.

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