Divestiture - Additional Information (Detail) - USD ($) $ in Thousands		4 Months Ended	6 Months Ended
Jan. 14, 2017	Apr. 22, 2017	Jul. 15, 2017
Business Combinations [Abstract]
Date of business unit sold	Jan. 14, 2017
Sale of non-core mix manufacturing business	$ 44,000
Decrease in amount by working capital adjustment	2,800
Gain on sale of business	28,875	$ 28,900	$ 28,875
Net proceeds from divestiture of business	$ 41,200		$ 41,230

Decrease in amount by working capital adjustment.

No definition available.

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- Definition

Cash inflow associated with the amount received from the sale of a portion of the company's business before allocation of a working capital adjustment.

+ References

No definition available.

+ Details

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- References

No definition available.

+ Details

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- Definition

Date the entity disposed of a business or a group of assets, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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Data Type:	xbrli:dateItemType
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Period Type:	duration

- Definition

Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4582445-111684

+ Details

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Balance Type:	credit
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- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585

+ Details

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