Fair Value Measurements (Summary of Valuation of Company's Financial Instruments by Various Levels) (Parenthetical) (Details) - USD ($)	Apr. 02, 2023	Dec. 31, 2022
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Short-term investments	$ 96,019,000	$ 80,925,000
Other non-current assets	103,030,000	97,793,000
Convertible debt securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Short-term investments	173,000	173,000
Other non-current assets	$ 173,000	$ 173,000