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Stock-Based Compensation - Summary of Grants of Performance Based Restricted Stock Units Associated with executive officers and Key Employees (Detail) - Performance Based Restricted Stock Units [Member] - $ / shares

Jul. 18, 2019

Aug. 02, 2018

Jul. 13, 2017

Senior Executives [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Restricted Stock Units Awarded

^[1],[2]

93,653

86,599

78,195

Price Per Share

^[2]

$ 18.49

^[3]

$ 18.51

^[4]

$ 31.85

^[5]

Vesting Period

^[2]

3 years

3 years

3 years

Key Employees [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Restricted Stock Units Awarded

^[1],[6]

15,213

47,800

44,000

Price Per Share

^[2],[3],[6]

$ 18.49

$ 24.35

$ 32.50

Vesting Period

^[6]

3 years

3 years

3 years

[1]	Amounts represent the maximum number of common stock shares that could be earned if certain performance targets are met as defined in the related restricted stock unit agreements.
[2]	Performance-based restricted stock units awarded to certain senior executives.
[3]	Price per share represents the closing price of our common stock on the date of grant.
[4]	Price per share represents the fair market value per share ($0.76 per $1 or a reduction of $5.84 to the closing price of the our common stock on the date of grant) determined using the Monte Carlo simulation model for the market-based total shareholder return component and the closing price of our common stock ($24.35) for the performance-based components of the performance-based restricted stock units granted to certain senior executives on August 2, 2018.
[5]	Price per share represents the fair market value per share ($0.98 per $1 or a reduction of $0.65 to the closing price of the our common stock on the date of grant) determined using the Monte Carlo simulation model for the market-based total shareholder return component and the closing price of our common stock ($32.50) for the performance-based components of the performance-based restricted stock units granted to certain senior executives on July 13, 2017.
[6]	Performance-based restricted stock units awarded to key employees.

X

- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

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).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

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).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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