Fair Value Measurements (Tables)

9 Months Ended

Sep. 27, 2013

Fair Value Disclosures [Abstract]

Financial Assets and Liabilities Measured at Fair Value Based on Three-Tier Fair Value Hierarchy

The following table sets forth the fair value of the Company’s financial assets and liabilities measured at fair value based on the three-tier fair value hierarchy (in thousands):

	Level 1		Level 2		Level 3		Total
As of September 27, 2013
Cash equivalents
Money market funds	$	58,220	$	—	$	—	$	58,220
Short-term investments
State, municipal and local government agencies bonds	—		36,233		—		36,233
Corporate bonds	—		32,381		—		32,381
Commercial paper	—		3,348		—		3,348
U.S. federal government bonds	4,004		—		—		4,004
Prepaids and other current assets
Foreign exchange forward contracts	—		5		—		5
Total assets measured and recorded at fair value	$	62,224	$	71,967	$	—	$	134,191
Accrued liabilities
Foreign exchange forward contracts	$	—	$	381	$	—	$	381
Total liabilities measured and recorded at fair value	$	—	$	381	$	—	$	381
	Level 1		Level 2		Level 3		Total
As of December 31, 2012
Cash equivalents
Money market funds	$	54,923	$	—	$	—	$	54,923
Corporate bonds with maturity less than 90 days	—		3,614		—		3,614
U.S. federal government bonds with maturity less than 90 days	3,005		—		—		3,005
Short-term investments
Certificates of deposit	—		1,603		—		1,603
State, municipal and local government agencies bonds	—		59,050		—		59,050
Corporate bonds	—		31,562		—		31,562
Commercial paper	—		10,288		—		10,288
U.S. federal government bonds	2,003		—		—		2,003
Prepaids and other current assets
Foreign exchange forward contracts	—		344		—		344
Total assets measured and recorded at fair value	$	59,931	$	106,461	$	—	$	166,392
Accrued liabilities
Foreign exchange forward contracts	$	—	$	143	$	—	$	143
Total liabilities measured and recorded at fair value	$	—	$	143	$	—	$	143