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Property and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 990,498	$ 864,744
Less accumulated depreciation and amortization	(615,497)	(530,838)
Property and equipment, net	375,001	333,906
Property and equipment related depreciation expense	67,300	63,800	$ 60,200
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	21,019	19,438
Buildings and permanent improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 143,250	127,097
Property and equipment, average useful life (in years)	40 years
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 106,236	95,048
Machinery and warehouse equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 138,478	121,395
Machinery and warehouse equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, average useful life (in years)	5 years
Machinery and warehouse equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, average useful life (in years)	10 years
Furniture, fixtures and other [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 149,136	129,444
Furniture, fixtures and other [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, average useful life (in years)	3 years
Furniture, fixtures and other [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, average useful life (in years)	10 years
Computer equipment and software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 432,379	$ 372,322
Computer equipment and software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, average useful life (in years)	3 years
Computer equipment and software [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, average useful life (in years)	10 years

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.14)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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X

- 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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Section S99
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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

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