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Stock-Based Compensation - Summary of 2015 Plan Activity (Detail) - 2015 Plan [Member]	4 Months Ended
	Apr. 18, 2020 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted Stock Awards, Outstanding, Beginning balance | shares	928,733
Restricted Stock Awards, Granted | shares	292,884
Restricted Stock Awards, Exercised/Vested | shares	(361,446)
Restricted Stock Awards, Cancelled/Forfeited | shares	(15,757)
Restricted Stock Awards, Outstanding, Ending balance | shares	844,414
Weighted Average Grant-Date Fair Value, Beginning balance | $ / shares	$ 20.28
Weighted Average Grant-Date Fair Value, Granted | $ / shares	12.43
Weighted Average Grant-Date Fair Value, Exercised/Vested | $ / shares	21.71
Weighted Average Grant-Date Fair Value, Cancelled/Forfeited | $ / shares	19.10
Weighted Average Grant-Date Fair Value, Ending balance | $ / shares	$ 16.97

X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

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-Publisher FASB
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-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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