Fair Value Measurements (Tables)

3 Months Ended

Mar. 30, 2014

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table summarizes the financial assets and liabilities required to be measured at fair value on a recurring basis as of March 30, 2014 (in thousands):

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Assets:
Money market instruments	$	5,723	$	—
Corporate bonds	—		224,352
Treasury bills	—		86,804
Asset-backed securities	—		74,885
Sovereign bonds	—		20,417
Municipal bonds	—		11,779
Agency bonds	—		1,500
Cash flow hedge forward contracts	—		33
Liabilities:
Cash flow hedge forward contracts	—		112