CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 26, 2016	Dec. 26, 2015	Mar. 28, 2015
Stockholders’ equity:
Common stock, par value (dollars per share)	$ 0.008	$ 0.008	$ 0.008
Common stock, shares authorized (in shares)	400,000,000	400,000,000	400,000,000
Common stock, shares issued (in shares)	168,830,000	167,716,000	167,082,000
Common stock, shares outstanding (in shares)	134,645,000	136,382,000	136,615,000
Preferred stock, shares issued (in shares)	$ 1.00	$ 1.00	$ 1.00
Preferred stock, shares authorized (in shares)	40,000	40,000	40,000
Preferred stock, shares issued (in shares)	0	0	0
Treasury stock, shares (in shares)	34,185,000	31,334,000	30,467,000