Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value Measurements [Abstract]

Financial Assets And Liability Measured At Fair Value On A Recurring Basis

	Fair Value Measurements at December 31, 2012 Using
		Quoted Prices in		Significant
		Active Markets		Other		Significant
		for		Observable		Unobservable		Balance
		Identical Assets		Inputs		Inputs		as of
Description		(Level 1)		(Level 2)		(Level 3)		December 31, 2012
Assets:
Certificate of deposit	$	—	$	75	$	—	$	75
Money market funds		43,505		—		—		43,505
Restricted Italian state
bonds		384		—		—		384
Total	$	43,889	$	75	$	—	$	43,964

	Fair Value Measurements at December 31, 2011 Using
		Quoted Prices in		Significant
		Active Markets		Other		Significant
		for		Observable		Unobservable		Balance
		Identical Assets		Inputs		Inputs		as of
Description		(Level 1)		(Level 2)		(Level 3)		December 31, 2011
Assets:
Money market funds	$	31,849	$	—	$	—	$	31,849
Restricted Italian state
bonds		364		—		—		364
Total	$	32,213	$	—	$	—	$	32,213
Liability:
Contingent
consideration	$	—	$	—	$	15,400	$	15,400
Total	$	—	$	—	$	15,400	$	15,400

Schedule Of Change In Estimated Fair Value Of Contingent Consideration

	Auction Rate		Put		Contingent
	Securities		Option		Consideration
Balance at December 31, 2009	$	1,588	$	202	$	—
Proceeds from sales		(1,800)		—		—
Total realized gain (loss) included in other income (expense)		212		(202)		—
Balance at December 31, 2010		—		—		—
Fair value at acquisition date		—		—		18,870
Change in the estimated fair value of the
contingent consideration liability		—		—		(3,495)
Translation adjustments		—		—		25
Balance at December 31, 2011		—		—		15,400
Change in the estimated fair value of the
contingent consideration liability		—		—		(15,422)
Translation adjustments		—		—		22
Balance at December 31, 2012	$	—	$	—	$	—