Represents the maximum payout of shares granted upon the actual performance against the Performance Measures.

No definition available.

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- Definition

Represents the minimum payout of shares granted upon the actual performance against the Performance Measures.

+ References

No definition available.

+ Details

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- Definition

Represents information pertaining to period over which the relative total shareholder return is to be calculated to enable vesting of share-based payment awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&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://www.xbrl.org/2003/role/presentationRef
-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=96867065&loc=d3e5070-113901

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(2)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

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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.

+ References

No definition available.

+ Details

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- Definition

Percentage of vesting of share-based compensation awards.

+ References

+ Details

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- Definition

Value, before forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP).

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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STOCK-BASED COMPENSATION - RSAs and RSUs (Details) - Senior Management - USD ($) $ in Millions			12 Months Ended
	Jan. 17, 2017	Jan. 14, 2016	Dec. 31, 2011
Performance-Contingent RSAs and RSUs \| Long-term retention and incentive performance-contingent RSAs
Stock-based compensation
Vested (in shares)			63,000
Timeframe for achievement of performance conditions			6 years
Market-Based RSAs and RSUs \| TSR and Performance Measures
Stock-based compensation
Timeframe for calculation of TSR	2 years	2 years
Minimum payout of shares (in shares)	0	0
Maximum payout of shares (in shares)	406,868	328,688
Aggregate value recognized as compensation expense	$ 3.2	$ 2.0
Market-Based RSAs and RSUs \| TSR and Performance Measures \| Vesting on February 20, 2018
Stock-based compensation
Vesting percentage		67.00%
Market-Based RSAs and RSUs \| TSR and Performance Measures \| Vesting on February 20, 2019
Stock-based compensation
Vesting percentage	66.70%
Market-Based RSAs \| TSR and Performance Measures
Stock-based compensation
Granted (in shares)	353,508	282,394
Market-Based RSAs \| TSR and Performance Measures \| Vesting on February 20, 2019
Stock-based compensation
Vesting percentage		33.30%
Market-Based RSAs \| TSR and Performance Measures \| Vesting on February 20, 2020
Stock-based compensation
Vesting percentage	33.30%
Market-Based RSUs \| TSR and Performance Measures
Stock-based compensation
Granted (in shares)	53,360	46,294
Market-Based RSUs \| TSR and Performance Measures \| Vesting on November 20, 2018
Stock-based compensation
Vesting percentage		33.30%
Market-Based RSUs \| TSR and Performance Measures \| Vesting on November 20, 2019
Stock-based compensation
Vesting percentage	33.30%