Available-For-Sale Investments (Tables)

9 Months Ended

Sep. 30, 2012

Available-For-Sale Investments [Abstract]

Summary Of Available-For-Sale Investments

		September 30, 2012
						Unrealized
						Losses for
		Amortized		Unrealized		More Than		Estimated
		Cost		Gains		12 Months		Fair Value
Money market funds	$	53,506	$	—	$	—	$	53,506
Restricted Italian state bonds maturing
in 2013		451		—		(77)		374
Total available-for-sale investments	$	53,957	$	—	$	(77)	$	53,880

		December 31, 2011
						Unrealized
						Losses for
		Amortized		Unrealized		More Than		Estimated
		Cost		Gains		12 Months		Fair Value
Money market funds	$	31,849	$	—	$	—	$	31,849
Restricted Italian state bonds maturing
in 2013		450		—		(86)		364
Total available-for-sale investments	$	32,299	$	—	$	(86)	$	32,213