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Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($)
$ in Thousands
Total
Common Stock
Capital in Excess of Par Value
Retained Earnings
Treasury Stock
Accumulated Other Comprehensive Items
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Treasury stock (in shares)         3,003,419    
Common stock, beginning balance (in shares) at Jan. 01, 2022   14,624,159          
Beginning balance at Jan. 01, 2022 $ 565,616 $ 146 $ 115,888 $ 551,848 $ (73,596) $ (30,350) $ 1,680
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 41,441     41,192     249
Dividend declared – Common Stock (3,031)     (3,031)      
Activity under stock plans (in shares)         (38,633)    
Activity under stock plans (2,290)   (3,237)   $ 947    
Other comprehensive items (1,998)         (1,952) (46)
Common stock, ending balance (in shares) at Apr. 02, 2022   14,624,159          
Treasury stock, ending balance (in shares) at Apr. 02, 2022         2,964,786    
Ending balance at Apr. 02, 2022 $ 599,738 $ 146 112,651 590,009 $ (72,649) (32,302) 1,883
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Treasury stock (in shares)         2,964,786    
Treasury stock (in shares) 2,949,997       2,949,997    
Common stock, beginning balance (in shares) at Dec. 31, 2022   14,624,159          
Beginning balance at Dec. 31, 2022 $ 655,571 $ 146 119,924 660,644 $ (72,287) (54,578) 1,722
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 28,259     28,075     184
Dividend declared – Common Stock (3,394)     (3,394)      
Activity under stock plans (in shares)         (29,319)    
Activity under stock plans (1,659)   (2,377)   $ 718    
Other comprehensive items $ 5,528         5,493 35
Common stock, ending balance (in shares) at Apr. 01, 2023   14,624,159          
Treasury stock, ending balance (in shares) at Apr. 01, 2023 2,920,678       2,920,678    
Ending balance at Apr. 01, 2023 $ 684,305 $ 146 $ 117,547 $ 685,325 $ (71,569) $ (49,085) $ 1,941
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Treasury stock (in shares) 2,920,678       2,920,678