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Stock-Based Compensation (Narrative) (Details) - USD ($) $ in Thousands, shares in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term	6 years	6 years	6 years
Deferred compensation	$ 12,300	$ 15,980
Current maturities of other long-term obligations	719	876
Other long-term liabilities	11,581	15,104
Total fair-market value of deferred compensation	8,885	12,203
Non-vested Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 3,500
Nonvested stock, weighted average recognition period	1 year 2 months 1 day
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (years)	3 years
Unrecognized compensation cost	$ 300
Nonvested stock, weighted average recognition period	8 months 12 days
Total value of shares vested	$ 654	$ 0	$ 223
Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future issuance (shares)	3.4
Exercised period (years)	10 years
Plan | Cliff vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (years)	4 years

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 710
-SubTopic 10
-Section 30
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