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Other Retirement Plans (Details) - USD ($)	12 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 29, 2013
Other Retirement Plans [Line Items]
Cost Related to Other Retirement Plans	$ 4,125,000	$ 3,963,000	$ 3,739,000
GCIU- Employer Retirement Fund [Member] | Multiemployer Plans, Pension [Member]
Other Retirement Plans [Line Items]
Pension Contributions	145,000	265,000	246,000
CWA/ITU Negotiated Pension Plan [Member] | Multiemployer Plans, Pension [Member]
Other Retirement Plans [Line Items]
Pension Contributions	122,000	133,000	143,000
District No. 9 Pension Trust [Member] | Multiemployer Plans, Pension [Member]
Other Retirement Plans [Line Items]
Pension Contributions	$ 34,000	$ 37,000	$ 40,000

X

- Definition

Cost Related to Other Retirement Plans- amounts recognized as expense during the year related to other retirement plans including defined contribution plans, deferred compensation arrangements, among others.

+ References

No definition available.

+ Details

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Balance Type:	debit
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X

- Definition

[Line Items] for Other Retirement Plans [Table]

+ References

No definition available.

+ Details

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X

- Definition

The amount of cash or cash equivalents contributed by the entity to fund its pension plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3536-108585

+ Details

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- Details

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- Details

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- Details

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- Details

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