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Accumulated Other Comprehensive Income (Loss) Changes in AOCI by component (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 25, 2017	Feb. 27, 2016	Feb. 25, 2017	Feb. 27, 2016
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	$ 6,952	$ 14,598	$ 10,975	$ (2,274)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
OCI before reclassifications	(439)	0	3,464	17,701
Amounts reclassified from AOCI	(7,413)	(982)	(15,339)	(1,811)
Net current-period OCI	(7,852)	(982)	(11,875)	15,890
Balance at end of period	(900)	13,616	(900)	13,616
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	6,952	14,598	10,975	(2,274)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
OCI before reclassifications	0	0	3,903	17,701
Amounts reclassified from AOCI	(7,413)	(982)	(15,339)	(1,811)
Net current-period OCI	(7,413)	(982)	(11,436)	15,890
Balance at end of period	(461)	13,616	(461)	13,616
Accumulated Net Gain (Loss) from Interest Rate Swap [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	0	0	0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
OCI before reclassifications	(439)	0	(439)	0
Amounts reclassified from AOCI	0	0	0	0
Net current-period OCI	(439)	0	(439)	0
Balance at end of period	$ (439)	$ 0	$ (439)	$ 0

X

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e637-108580

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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

+ References

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-Name Accounting Standards Codification
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-SubTopic 10
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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount after tax of reclassification adjustments of other comprehensive income (loss).

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