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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions			3 Months Ended
	Mar. 27, 2020	Mar. 26, 2020	Mar. 31, 2020	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Business interest income, adjusted taxable income		30.00%
CARES act of 2020, Business interest income, adjusted taxable income	50.00%
Cash tax benefit due to reversal of valuation allowance			$ 0.5
Estimated reduction in unrecognized tax benefits due to expiration of certain statutes of limitations				$ 0.7

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- Definition

Cash tax benefit due to reversal of valuation allowance.

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- Definition

Coronavirus aid relief and economic security act effective income tax rate reconciliation deduction of interest income.

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- Definition

Tax cuts and jobs act of 2017 effective income tax rate reconciliation, deduction of interest income.

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- Definition

Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (d)(3)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

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