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Consolidated Balance Sheets (Parentheticals) - USD ($)
shares in Thousands, $ / shares in Thousands, $ in Thousands
Dec. 31, 2016
Dec. 31, 2015
LIFO debit $ 8,045 $ 6,555
Preferred stock, par value (in dollars per share) $ 0 $ 0
Preferred stock, shares authorized (in shares) 5,000 5,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0 $ 0
Common stock, shares authorized (in shares) 20,000 20,000
Common stock, shares issued (in shares) 10,963 10,955
Common stock, shares outstanding (in shares) 10,963 10,955
Treasury stock, shares (in shares) 57 65