Marketable Securities (Tables)

6 Months Ended

Jun. 26, 2016

Investments, Debt and Equity Securities [Abstract]

Marketable Debt and Equity Securities

Our marketable debt securities consisted of the following:

(In thousands)	June 26, 2016		December 27, 2015
Short-term marketable securities
U.S Treasury securities	$	85,451	$	184,278
Corporate debt securities	141,425		185,561
U.S. agency securities	53,649		65,222
Municipal securities	—		1,363
Certificates of deposit	28,246		60,244
Commercial paper	18,870		10,971
Total short-term marketable securities	$	327,641	$	507,639
Long-term marketable securities
Corporate debt securities	$	81,358	$	119,784
U.S. agency securities	88,538		150,583
U.S Treasury securities	17,783		20,769
Total long-term marketable securities	$	187,679	$	291,136