CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares shares in Thousands	Dec. 26, 2020	Dec. 28, 2019
Stockholders' Equity Attributable to Parent [Abstract]
Preferred Stock, Shares Authorized	40	40
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, issued (in shares)	0	0
Common stock, authorized (in shares)	400,000	400,000
Common stock, par value (in dollars per share)	$ 0.008	$ 0.008
Common stock, issued (in shares)	175,128	173,608
Common stock, outstanding (in shares)	116,246	118,165
Treasury stock, at cost (in shares)	58,882	55,443