Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals)) - USD ($) $ in Thousands	Jul. 01, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 256,689	$ 251,888
Stockholders' Equity, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred stock, par value (in usd per share)	$ 1	$ 1
Preferred stock, shares authorized (in shares)	200,000	200,000
Preferred Stock, Shares Outstanding	0	0
Common stock, par value (in usd per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	30,584,400	30,434,269
Common stock held in treasury, at cost (in shares)	2,598,056	2,573,896