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Debt (Schedule of Debt Instruments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total debt, including current portion	$ 95,974	$ 193,489
Series B maturing Paid January 2022
Debt Instrument [Line Items]
Average interest rate	5.01%
Debt Instrument, Maturity Date, Description	January 2022
Total debt, including current portion	$ 0	75,000
Series D maturing July 2026
Debt Instrument [Line Items]
Average interest rate	5.35%
Debt Instrument, Maturity Date, Description	July 2026
Total debt, including current portion	$ 75,000	75,000
Revolving Credit Facility
Debt Instrument [Line Items]
Debt Instrument, Maturity Date, Description	March 2026
Total debt, including current portion	$ 0	0
Chinese Renminbi Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Average interest rate	3.34%
Total debt, including current portion	$ 14,327	39,222
Notes payable to banks maturing 2023
Debt Instrument [Line Items]
Average interest rate	2.80%
Debt Instrument, Maturity Date, Description	2023
Total debt, including current portion	$ 6,647	$ 4,267
Line of Credit | Committed Facility | Minimum | Revolving Credit Facility | Cash flow leverage ratio no acquisition
Debt Instrument [Line Items]
Debt Instrument, Covenant Compliance	1.00
Line of Credit | Committed Facility | Minimum | Revolving Credit Facility | Cash flow leverage ratio with acquisitions
Debt Instrument [Line Items]
Debt Instrument, Covenant Compliance	1.00
Line of Credit | Committed Facility | Minimum | Revolving Credit Facility | Interest coverage ratio no acquisitions
Debt Instrument [Line Items]
Debt Instrument, Covenant Compliance	1.00
Line of Credit | Committed Facility | Minimum | Revolving Credit Facility | Interest coverage ratio with acquisitions
Debt Instrument [Line Items]
Debt Instrument, Covenant Compliance	1.00
Line of Credit | Committed Facility | Maximum | Revolving Credit Facility | Cash flow leverage ratio no acquisition
Debt Instrument [Line Items]
Debt Instrument, Covenant Compliance	3.50
Line of Credit | Committed Facility | Maximum | Revolving Credit Facility | Cash flow leverage ratio with acquisitions
Debt Instrument [Line Items]
Debt Instrument, Covenant Compliance	4.00
Line of Credit | Committed Facility | Maximum | Revolving Credit Facility | Interest coverage ratio no acquisitions
Debt Instrument [Line Items]
Debt Instrument, Covenant Compliance	3.00
Line of Credit | Committed Facility | Maximum | Revolving Credit Facility | Interest coverage ratio with acquisitions
Debt Instrument [Line Items]
Debt Instrument, Covenant Compliance	2.50

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