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Income Taxes - Additional Information (Detail)
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12 Months Ended | |
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Dec. 27, 2014
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Dec. 28, 2013
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| Income Tax Disclosure [Abstract] | ||
| Effective tax rate | 36.50%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 39.33%us-gaap_EffectiveIncomeTaxRateContinuingOperations |
| Period to assess/collect taxes | 3 years | |
| Percentage of understated income taxes required for extension of limitation of statute, minimum | 25.00%dvly_PercentageOfUnderstatedTaxRequiredForExtensionOfLimitationOfStatuteMinimum | |
| Period for statute of limitations | 6 years | |
| X | ||||||||||
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- Definition
Income tax examination period to assess or collect taxes. No definition available.
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| X | ||||||||||
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- Definition
Percentage of understated tax required for extension of limitation of statute minimum. No definition available.
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| X | ||||||||||
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- Definition
Period for statute of limitations. No definition available.
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- Definition
Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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