Marketable Securities (Tables)

9 Months Ended

Sep. 27, 2014

Investments, Debt and Equity Securities [Abstract]

Schedule of Contractual Maturities of Marketable Securities

The following table summarizes the contractual maturities of our marketable securities (at fair value and in thousands): 

	September 27, 2014		December 28, 2013
Short-term marketable securities:
Maturities of less than five years	$	134,131	$	101,505
Long-term marketable securities:
Maturities of more than ten years	—		5,241
Total marketable securities	$	134,131	$	106,746

Schedule of Composition of Marketable Securities

The following table summarizes the composition of our marketable securities (at fair value and in thousands):

	September 27, 2014		December 28, 2013
Short-term marketable securities:
Corporate and government bonds and notes and commercial paper	$	134,131	$	101,505
Long-term marketable securities:
Federally-insured or FFELP guaranteed student loans	—		5,241
Total marketable securities	$	134,131	$	106,746

Schedule of Composition of Auction Rate Securities

The following table summarizes the composition of our auction rate securities (in thousands):

	September 27, 2014					December 28, 2013
	Par Value		Fair Value		S&P  Credit  rating	Par Value		Fair Value		S&P  Credit  rating
Long-term marketable securities:
Federally-insured or FFELP guaranteed student loans	$	—	$	—		$	5,700	$	5,241	AA+
Total auction rate securities	$	—	$	—		$	5,700	$	5,241