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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2018	Dec. 30, 2017	Apr. 01, 2017	Dec. 30, 2017
Income Tax Disclosure [Abstract]
Effective income tax rate reconciliation at federal statutory income tax rate	21.00%		35.00%	35.00%
Dividend received deduction	100.00%
(Benefit from) provision for income taxes	$ (12,617)	$ 56,560	$ (9,128)
Effective income tax rate	(47.70%)		(629.20%)
Benefit on closure of subsidiary	$ (1,859)		$ (11,940)
Tax shortfall on share-based awards	$ (18,105)		$ 1,184

X

- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for dividend.

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