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Related Party Transactions (Narrative) (Details) - USD ($) $ in Millions	Sep. 24, 2016	Sep. 26, 2015	Sep. 27, 2014	Sep. 28, 2013
Equity, Class of Treasury Stock [Line Items]
Short-term non-interest bearing loans outstanding to investment/profit sharing plan	$ 0.0	$ 0.0
Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Shares authorized for repurchase				4,000,000
Common Stock [Member] | Class B Common Stock [Member] | Robert P. Ingle, Former CEO and Director [Member]
Equity, Class of Treasury Stock [Line Items]
Shares authorized for repurchase			2,500,000
Purchase price of shares			$ 65.0

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- Definition

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- Definition

For an unclassified balance sheet, reflects the carrying amount of unpaid loan amounts due from related parties at the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(e))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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- Definition

Amount of stock repurchase plan authorized.

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- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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