Lapse in period of restricted shares issued under plans.

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- Definition

Number of non-management members.

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No definition available.

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- Definition

Share based compensation arrangement by share based payment award maximum annual number of shares per employee.

+ References

No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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- Definition

Amount of deferred tax expense from write-off of the deferred tax asset related to deductible stock options at exercise.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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-Paragraph 20
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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 2
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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

+ References

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- Definition

Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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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
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-Name Accounting Standards Codification
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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 2
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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 difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

+ References

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- Definition

Description of pertinent provisions of equity-based compensation awards that have actual or potential impact upon the company's financial statements.

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- Definition

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

+ References

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- Definition

Weighted average grant-date fair value of non-vested options outstanding.

+ References

No definition available.

+ Details

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- Definition

Number of share options (or share units) exercised during the current period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Employee Stock Based Compensation - Additional Information (Detail) $ / shares in Units, $ in Thousands			12 Months Ended
	May 19, 2017 Members $ / shares shares	Mar. 03, 2017 $ / shares shares	Dec. 30, 2017 USD ($) $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Jan. 02, 2016 USD ($) shares	Mar. 28, 2016 shares	May 07, 2014 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding Intrinsic Value			$ 31,789
Exercisable options intrinsic value			31,748
Aggregate intrinsic value of stock options exercised			$ 5,100	$ 5,100	$ 10,800
Number of shares exercised \| shares			470,622	537,364	1,033,750
Proceeds from exercise of stock options			$ 941	$ 981	$ 2,192
Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards \| shares	34,699		291,173
Weighted average fair value of common stock \| $ / shares	$ 11.60		$ 10.35	$ 10.05
Number of non-management members of board of directors \| Members	7
Total unrecognized compensation			$ 1,600
Weighted-average period			1 year 4 months 24 days
Restricted Stock Award [Member] \| Seven Members of Board of Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Lapsing period of restrictions related to restricted stock issued	1 year
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards \| shares		251,474
Performance criteria defined in share awards			The percentages, ranging from less than 80% to greater than 120%, provide for the awarding of shares ranging from 0% to 150% of the target amount and only related to half of the initial March 3, 2017, issuance of 251,474 shares, or 125,737 shares.
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding Intrinsic Value				$ 24,600	29,700
Exercisable options intrinsic value				24,600	29,500
Total fair value of options vested			$ 29	32	1,200
Tax benefit realized			1,800	1,900	3,800
Proceeds from exercise of stock options			$ 900	1,000	2,200
2014 Omnibus Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares available for grant \| shares			827,142				1,500,000
Maximum number of shares \| shares							1,500,000
2014 Omnibus Equity Incentive Plan [Member] \| Restricted Stock Award [Member] \| Directors Executives and Non-Executive Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards \| shares			291,173
Weighted average fair value of common stock \| $ / shares			$ 10.47
2006 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares available for grant \| shares						0
Compensation cost charged against income for stock compensation plan			$ 1,900	$ 1,900	$ 1,800
2015 Omnibus Incentive Plan [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards \| shares		125,737
Weighted average fair value of common stock \| $ / shares		$ 10.20