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Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares
12 Months Ended
Dec. 31, 2017
Jan. 01, 2017
Jan. 03, 2016
Dividends per share $ 0.60 $ 0.525 $ 0.40
Retained Earnings [Member]      
Dividends per share $ 0.60 $ 0.525 $ 0.40