Fair Value Measurements (Tables)

6 Months Ended

Jun. 28, 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 June 28, 2013
Cash equivalents
Money market funds	$	40,579	$	—	$	—	$	40,579
Short-term investments
Certificates of deposit		—		1,607		—		1,607
State, municipal and local government agencies bonds		—		41,597		—		41,597
Corporate bonds		—		25,425		—		25,425
Commercial paper		—		3,846		—		3,846
U.S. federal government bonds		6,003		—		—		6,003
Prepaids and other current assets
Foreign exchange forward contracts		—		131		—		131
Total assets measured and recorded at fair value	$	46,582	$	72,606	$	—	$	119,188
Accrued liabilities
Foreign exchange forward contracts	$	—	$	232	$	—	$	232
Total liabilities measured and recorded at fair value	$	—	$	232	$	—	$	232
	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