Marketable Securities (Tables)

12 Months Ended

Dec. 28, 2014

Investments, Debt and Equity Securities [Abstract]

Marketable Debt and Equity Securities

Our marketable debt securities consisted of the following:

(In thousands)	December 28, 2014		December 29, 2013
Short-term marketable securities
Marketable debt securities
U.S Treasury securities	$	238,488	$	143,510
Corporate debt securities	208,346		78,991
U.S. agency securities	32,009		31,518
Municipal securities	13,622		48,035
Certificates of deposit	109,293		31,949
Commercial paper	34,985		30,877
Total short-term marketable securities	$	636,743	$	364,880
Long-term marketable securities
Marketable debt securities
Corporate debt securities	$	71,191	$	98,979
U.S. agency securities	95,204		73,697
Municipal securities	1,425		3,479
Total long-term marketable securities	$	167,820	$	176,155