Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Shareholders' Equity (Parenthetical)

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Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Jan. 03, 2015
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Payment of dividends (dollars per share) $ 0 $ 0.30 $ 0.30
Issuance of shares of common stock from the treasury (in shares) 62,124 26,118 14,522
Stock options exercised, net (shares) 0 666 7,980
Issuance of common stock (shares) 0 0 0
Shares of common stock purchased 29,500 100,400 0