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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
shares in Thousands, $ in Thousands
Sep. 29, 2018
Sep. 30, 2017
Consolidated Balance Sheets Parenthetical [Abstract]    
Allowance for doubtful accounts and notes receivable $ 385 $ 79
Preferred stock, without par value (usd per share) $ 0 $ 0
Preferred stock, shares authorized 5,000 5,000
Preferred stock, shares issued 0 0
Common stock, no par value (usd per share) $ 0 $ 0
Common stock, shares authorized 200,000 200,000
Common stock, shares issued 84,659 83,953
Common stock, shares outstanding 67,143 70,197
Treasury stock, shares 17,516 13,756