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Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) (USD $)
3 Months Ended 6 Months Ended
Jul. 12, 2014
Jul. 13, 2013
Jul. 12, 2014
Jul. 13, 2013
Dividends paid, per common share $ 0.1200 $ 0.1125 $ 0.2325 $ 0.2192