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CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - shares | 6 Months Ended
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Jun. 25, 2016 | Jun. 27, 2015
Statement of Stockholders' Equity [Abstract] |  |
Purchase of treasury shares, shares acquired (in shares) | 245,798 | 989,821
Stock plan exercises; shares acquired (in shares) | 10,747 | 82,989
Stock options exercised; shares issued (in shares) | 62,535 | 119,687
Stock awards; shares issued (in shares) | 6,976 | 4,846

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