Fair Value of Financial Instruments (Details) - Fair Value Measurements Recurring $ in Thousands	Dec. 30, 2018 USD ($)
Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	$ 2,585
Level 1 | Fixed Income Funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	866
Level 1 | Stock Index Funds | Small Cap
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	229
Level 1 | Stock Index Funds | Mid Cap
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	238
Level 1 | Stock Index Funds | Large Cap
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	493
Level 1 | Stock Index Funds | International
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	759
Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	60
Level 2 | Cash and Cash Equivalents
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	6
Level 2 | Mexican Peso Forward Contracts
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	$ 54