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Business Segments - Reconciliation of Adjusted EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 24, 2018	Feb. 25, 2017	Feb. 24, 2018	Feb. 25, 2017
Segment Reporting [Abstract]
Net income	$ 22,088	$ 15,278	$ 40,046	$ 27,016
Interest expense	4,918	5,178	9,699	6,306
Provision for income taxes	8,234	7,916	16,794	13,536
Depreciation	2,198	1,848	4,328	3,428
Amortization of intangible assets	1,933	10,367	3,988	12,418
EBITDA	39,371	40,587	74,855	62,704
Postretirement health care benefit income	0	(11,983)	0	(24,796)
Transaction costs	0	463	50	5,925
Non-operating expense (income)	11	4	(112)	(83)
Adjusted EBITDA	$ 39,382	$ 29,071	$ 74,793	$ 43,750

X

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

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-Publisher FASB
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- Definition

For transactions that are recognized separately from the acquisition of assets and assumptions of liabilities in the business combination, such as related to pre-existing relationships with the acquiree, this element represents the disclosure of the amount of acquisition related costs which have been expensed.

+ References

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-Publisher FASB
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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

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- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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- Definition

Amount of income (expense) related to nonoperating activities, classified as other.

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- Definition

Adjusted EBITDA

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No definition available.

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- Definition

EBITDA

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No definition available.

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- Definition

Postretirement health care benefit income

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No definition available.

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