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Consolidated Statements of Changes in Equity (Parenthetical) (Unaudited) (USD $) | 6 Months Ended
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Jul. 01, 2012 | Jul. 03, 2011
Class B common stock Shares issued | 22,320 | 22,320
Common Stock |  |
Cash dividend per share | $ 0.50 | $ 0.50
Class B Common Stock |  |
Cash dividend per share | $ 0.50 | $ 0.50

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