Fair Value Measurements (Tables)

3 Months Ended

Mar. 28, 2014

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 March 28, 2014
Cash equivalents
Money market funds	$	25,814	$	—	$	—	$	25,814
Short-term investments
State, municipal and local government agencies bonds	—		38,785		—		38,785
Corporate bonds	—		30,466		—		30,466
Commercial paper	—		5,291		—		5,291
U.S. federal government bonds	4,005		—		—		4,005
Prepaids and other current assets
Derivative assets (1)	—		19		—		19
Total assets measured and recorded at fair value	$	29,819	$	74,561	$	—	$	104,380
Accrued liabilities
Derivative liabilities (1)	$	—	$	215	$	—	$	215
Total liabilities measured and recorded at fair value	$	—	$	215	$	—	$	215
	Level 1		Level 2		Level 3		Total
As of December 31, 2013
Cash equivalents
Money market funds	$	51,014	$	—	$	—	$	51,014
Short-term investments
State, municipal and local government agencies bonds	—		40,449		—		40,449
Corporate bonds	—		33,496		—		33,496
Commercial paper	—		2,299		—		2,299
U.S. federal government bonds	4,008		—		—		4,008
Prepaids and other current assets
Derivative assets (1)	—		196		—		196
Total assets measured and recorded at fair value	$	55,022	$	76,440	$	—	$	131,462
Accrued liabilities
Derivative liabilities (1)	$	—	$	195	$	—	$	195
Total liabilities measured and recorded at fair value	$	—	$	195	$	—	$	195