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Income Taxes - Additional Information (Detail)	3 Months Ended
	Sep. 24, 2015
United States [Member] | Earliest Tax Year [Member]
Income Tax Disclosure [Line Items]
Year of tax returns audit	2012
United States [Member] | Tax Year 2013 [Member]
Income Tax Disclosure [Line Items]
Year of tax returns currently under audit	2013
United States [Member] | Tax Year 2014 [Member]
Income Tax Disclosure [Line Items]
Year of tax returns currently under audit	2014
Illinois [Member] | Earliest Tax Year [Member]
Income Tax Disclosure [Line Items]
Year of tax returns audit	2013
Illinois [Member] | Tax Year 2013 [Member]
Income Tax Disclosure [Line Items]
Year of tax returns currently under audit	2013
Illinois [Member] | Tax Year 2014 [Member]
Income Tax Disclosure [Line Items]
Year of tax returns currently under audit	2014
California [Member] | Earliest Tax Year [Member]
Income Tax Disclosure [Line Items]
Year of tax returns audit	2011

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Income Tax Disclosure [Line Items]

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- Definition

Tax year being audited in the income tax examination, in CCYY format.

+ References

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- Definition

Tax year that remains open to examination under enacted tax laws, in CCYY format.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 740



-SubTopic 10



-Section 50



-Paragraph 15



-Subparagraph (e)



-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

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