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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - shares
shares in Thousands
12 Months Ended
Dec. 26, 2015
Dec. 27, 2014
Dec. 28, 2013
Statement of Stockholders' Equity [Abstract]      
Issuance of common stock under employee stock purchase plan (in shares) 68 79 87
Exercise of stock options (in shares) 1,117 1,179 2,681
Exercise of restricted stock units (in shares) 72 135 166
Repurchase of common stock (in shares) 3,416 4,664 2,287