Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2012

Fair Value Measurements

Fair values of financial and non-financial assets and liabilities

	Fair Value Measurements at September 30, 2012
	Total		Quoted Prices in Active Markets for IdenticalAssets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Short-term investments	$	167,345	$	167,345	$	—	$	—
Forward contracts	7,062		—		7,062		—
Total	$	174,407	$	167,345	$	7,062	$	—

	Fair Value Measurements at December 31, 2011
	Total		Quoted Prices in Active Markets for IdenticalAssets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Short-term investments	$	133,848	$	133,848	$	—	$	—
Forward contracts	5,105		—		5,105		—
Total	$	138,953	$	133,848	$	5,105	$	—