Fair Value Measurements (Tables)

3 Months Ended

Mar. 29, 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 as of March 29, 2013 and December 31, 2012, based on the three-tier fair value hierarchy (in thousands):

	Level 1		Level 2		Level 3		Total
As of March 29, 2013
Cash equivalents
Money market funds	$	62,370	$	—	$	—	$	62,370
U.S. federal government bonds with maturity less than 90 days		2,002		—		—		2,002
Short-term investments
Certificates of deposit		—		1,605		—		1,605
State, municipal and local government agencies bonds		—		59,191		—		59,191
Corporate bonds		—		31,047		—		31,047
Commercial paper		—		9,944		—		9,944
U.S. federal government bonds		8,003		—		—		8,003
Prepaids and other current assets
Foreign exchange forward contracts		—		735		—		735
Total assets measured and recorded at fair value	$	72,375	$	102,522	$	—	$	174,897
Accrued liabilities
Foreign exchange forward contracts	$	—	$	63	$	—	$	63
Total liabilities measured and recorded at fair value	$	—	$	63	$	—	$	63
	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