Current Vulnerability Due to Certain Concentrations (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended																	12 Months Ended
	Dec. 31, 2011 Y	Dec. 31, 2010 Credit Concentration Risk [Member]	Dec. 31, 2011 Credit Concentration Risk [Member] Cash and Cash Equivalents and Short-term Investments [Member] Bank Leumi [Member]	Dec. 31, 2011 Credit Concentration Risk [Member] Cash and Cash Equivalents and Short-term Investments [Member] Unicredit [Member]	Dec. 31, 2011 Credit Concentration Risk [Member] Cash and Cash Equivalents and Short-term Investments [Member] KBC [Member]	Dec. 31, 2011 Credit Concentration Risk [Member] Cash and Cash Equivalents and Short-term Investments [Member] JP Morgan Chase [Member]	Dec. 31, 2011 Credit Concentration Risk [Member] Accounts Receivable [Member]	Dec. 31, 2010 Credit Concentration Risk [Member] Accounts Receivable [Member]	Dec. 31, 2011 Geographic Concentration [Member] Cash and Cash Equivalents and Short-term Investments [Member] United States [Member]	Dec. 31, 2011 Geographic Concentration [Member] Cash and Cash Equivalents and Short-term Investments [Member] Germany [Member]	Dec. 31, 2011 Geographic Concentration [Member] Cash and Cash Equivalents and Short-term Investments [Member] Other Europe [Member]	Dec. 31, 2011 Geographic Concentration [Member] Cash and Cash Equivalents and Short-term Investments [Member] Israel [Member]	Dec. 31, 2011 Geographic Concentration [Member] Cash and Cash Equivalents and Short-term Investments [Member] People's Republic of China [Member]	Dec. 31, 2011 Geographic Concentration [Member] Cash and Cash Equivalents and Short-term Investments [Member] Other Asia [Member]	Dec. 31, 2011 Geographic Concentration [Member] Cash and Cash Equivalents and Short-term Investments [Member] Other Geographic Area [Member]	Dec. 31, 2011 Geographic Concentration [Member] Cash and Cash Equivalents and Short-term Investments [Member] Singapore [Member]	Dec. 31, 2011 Geographic Concentration [Member] Cash and Cash Equivalents and Short-term Investments [Member] Outside Of United States [Member]	Dec. 31, 2011 Geographic Concentration [Member] Revenue [Member] Outside Of United States [Member]
Concentration Risks [Abstract]
Concentration Risk, Geographic																		.78
Concentration Risk, Customer	0.109	0.087					0.109	0.087
Concentration risk percentage (in hundredths)			21.50%	14.40%	13.40%	11.90%			12.40%	28.00%	7.80%	29.90%	6.10%	6.30%	0.60%	8.90%
Cash and cash equivalents and short-term investments																	$ 875,073
Duration of business operations in Israel (in years)	41