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.

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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.

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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=6415400&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=6415400&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.

+ References

No definition available.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ 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)(3)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Percentage of vesting of share-based compensation awards.

+ References

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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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Stock-Based Compensation - Performance-Contingent RSAs and RSUs (Details) - USD ($) $ in Millions			12 Months Ended
	Jan. 17, 2017	Jan. 14, 2016	Dec. 31, 2011
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 of RSA and RSU grants	$ 3.2	$ 2.0
RSAs \| Vesting on February 20, 2018
Stock-based compensation
Vesting percentage		66.70%
RSAs \| Vesting on February 20, 2019
Stock-based compensation
Vesting percentage	66.70%	33.30%
RSAs \| Vesting On February 20, 2020
Stock-based compensation
Vesting percentage	33.30%
RSUs \| Vesting on February 20, 2018
Stock-based compensation
Vesting percentage		66.70%
RSUs \| Vesting on November 20, 2018
Stock-based compensation
Vesting percentage		33.30%
RSUs \| Vesting on February 20, 2019
Stock-based compensation
Vesting percentage	66.70%
RSUs \| Vesting On November 20, 2019
Stock-based compensation
Vesting percentage	33.30%
Special Long-Term Retention and Incentive Cash Awards Program \| RSAs \| Performance Contingent
Stock-based compensation
Shares of common stock approved and authorized for issuance			63,000
Timeframe for achievement of performance conditions			6 years
Senior Management \| RSAs \| TSR and Performance Measures
Stock-based compensation
Granted (in shares)	353,508	282,394
Senior Management \| RSUs \| TSR and Performance Measures
Stock-based compensation
Granted (in shares)	53,360	46,294