Share-Based Compensation Share-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation	$ 17,918	$ 20,928	$ 18,141
Less: Income tax benefit	3,418	4,985	6,520
Share-based compensation, net of income tax benefit	14,500	15,943	11,621
Total share-based compensation not yet recognized, non-vested awards	$ 22,022
Total share-based compensation not yet recognized, period for recognition, non-vested awards	2 years 1 month 12 days
Stock Options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation	$ 7,172	6,923	6,859
Restricted Stock
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation	6,030	5,778	5,051
Performance Condition Award
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation	1,491	1,764	4,681
Market Condition Performance Award
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation	1,987	1,533	1,550
Modified Awards
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation	1,238	4,930	$ 0
Reorganization and realignment
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation	$ 319	$ 197

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.

Reference 1: 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.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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The amount of expense, net of income tax, 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.

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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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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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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.

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- Definition

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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