CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 28, 2019	Sep. 28, 2019
Consolidated Balance Sheets Parenthetical [Abstract]
Allowance for doubtful accounts and notes receivable	$ 614	$ 597
Preferred stock, without par value (usd per share)	$ 0	$ 0
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Common stock, no par value (usd per share)	$ 0	$ 0
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	85,364,000	85,364,000
Common stock, shares outstanding	63,758,000	63,172,000
Treasury stock, shares	21,606,000	22,192,000