Marketable Securities (Tables)

3 Months Ended

Mar. 26, 2017

Investments, Debt and Equity Securities [Abstract]

Marketable Debt and Equity Securities

Our marketable debt securities consisted of the following:

(In thousands)	March 26, 2017		December 25, 2016
Short-term marketable securities
U.S Treasury securities	$	123,547	$	150,623
Corporate debt securities	154,255		150,599
U.S. governmental agency securities	56,079		64,135
Commercial paper	58,368		84,178
Total short-term marketable securities	$	392,249	$	449,535
Long-term marketable securities
U.S. governmental agency securities	$	115,690	$	110,732
Corporate debt securities	52,799		61,775
U.S Treasury securities	40,842		14,792
Total long-term marketable securities	$	209,331	$	187,299