Share-Based Compensation Performance Shares (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Share-based Compensation, Performance Shares, Nonvested, Number of Shares
Weighted average grant date fair value, dividend equivalent units issued	$ 0.00
Performance Condition Award
Share-based Compensation, Performance Shares, Nonvested, Number of Shares
Non-vested, beginning of period	604
Granted	157
Dividend equivalent units issued	12
Vested	(157)
Forfeited	(18)
Non-vested, end of period	598	604
Weighted average grant date fair value, non-vested, beginning of period	$ 11.13
Weighted average grant date fair value, granted	15.65
Weighted average grant date fair value, dividend equivalent units issued	0.00
Weighted average grant date fair value, vested	11.11
Weighted average grant date fair value, forfeited	12.88
Weighted average grant date fair value, non-vested, end of period	$ 12.32	$ 11.13
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Incremental Above Target	71
Total fair value, vested in period	$ 3,681	$ 5,666	$ 5,954
Market Condition Performance Award
Share-based Compensation Arrangement by Share-based Payment Award
Risk-free interest rate	2.38%	1.44%	0.82%
Expected life in years	3 years	3 years	3 years
Expected volatility	24.97%	25.06%	27.03%
Expected dividend yield	0.00%	0.00%	0.00%
Share-based Compensation, Performance Shares, Nonvested, Number of Shares
Non-vested, beginning of period	498
Granted	128
Dividend equivalent units issued	10
Vested	(103)
Forfeited	(15)
Non-vested, end of period	518	498
Weighted average grant date fair value, non-vested, beginning of period	$ 13.49
Weighted average grant date fair value, granted	19.22
Weighted average grant date fair value, dividend equivalent units issued	0.00
Weighted average grant date fair value, vested	17.08
Weighted average grant date fair value, forfeited	15.11
Weighted average grant date fair value, non-vested, end of period	$ 14.22	$ 13.49
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Incremental Above Target	93
Total fair value, vested in period	$ 3,143	$ 0	$ 0
Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Performance Shares Vesting Range, Percentage of Target	0.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Performance Shares Vesting Range, Percentage of Target	200.00%

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

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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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).

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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).

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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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

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

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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.

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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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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No definition available.

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- Definition

Expected term of share-based compensation awards, 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 (f)(2)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.D.2)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

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- Definition

Performance Shares Vesting Range, Percentage of Target

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Dividend Equivalent Units Issued

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Dividend Equivalent Units Issued in Period, Weighted Average Grant Date Fair Value

+ References

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Incremental Above Target

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No definition available.

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