Description of Business and Significant Accounting Policies (Narrative) (Details)	3 Months Ended
	Mar. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Entity Incorporation, Date of Incorporation	Nov. 13, 1973
Operating Cycle	The fiscal year of the Company consists of a 52- or 53-week period ending on the Saturday closest to December 31. Fiscal year 2019 is a 52-week period ending on December 28, 2019, with quarterly periods ending on March 30, June 29 and September 28, 2019. Fiscal year 2018 was a 52-week period ending on December 29, 2018, with quarterly periods ending on March 31, June 30 and September 29, 2018.