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Consolidated Statement of Stockholders' Equity - USD ($)
$ in Thousands
Total
Cumulative Effect, Period of Adoption, Adjustment
Common Stock
Capital in Excess of Par Value
Retained Earnings
Retained Earnings
Cumulative Effect, Period of Adoption, Adjustment
Treasury Stock
Accumulated Other Comprehensive Items
Noncontrolling Interest
Beginning balance (in shares) at Dec. 30, 2017     14,624,159       3,613,838    
Beginning balance at Dec. 30, 2017 $ 332,504   $ 146 $ 103,221 $ 342,893   $ (88,554) $ (26,715) $ 1,513
Beginning balance (Accounting Standards Update 2014-09) at Dec. 30, 2017   $ 119       $ 119      
Beginning balance (Accounting Standards Update 2016-16) at Dec. 30, 2017   (75)       (75)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income 61,046       60,413       633
Dividends declared - Common Stock (9,772)       (9,772)        
Dividend paid to noncontrolling interest (465)               (465)
Activity under stock plans (in shares)             (99,675)    
Activity under stock plans 3,953     1,510     $ 2,443    
Other comprehensive items (12,739)             (12,661) (78)
Ending balance (in shares) at Dec. 29, 2018     14,624,159       3,514,163    
Ending balance at Dec. 29, 2018 $ 374,571 $ (17) $ 146 104,731 393,578 $ (17) $ (86,111) (39,376) 1,603
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Accounting Standards Update [Extensible List] us-gaap:AccountingStandardsUpdate201602Member                
Net income $ 52,564       52,068       496
Dividends declared - Common Stock (10,380)       (10,380)        
Dividend paid to noncontrolling interest (664)               (664)
Activity under stock plans (in shares)             (299,275)    
Activity under stock plans 9,300     1,967     $ 7,333    
Other comprehensive items 1,705             1,756 (51)
Ending balance (in shares) at Dec. 28, 2019     14,624,159       3,214,888    
Ending balance at Dec. 28, 2019 427,079   $ 146 106,698 435,249   $ (78,778) (37,620) 1,384
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income 55,739       55,196       543
Dividends declared - Common Stock (11,045)       (11,045)        
Dividend paid to noncontrolling interest (525)               (525)
Activity under stock plans (in shares)             (132,969)    
Activity under stock plans 7,385     4,126     $ 3,259    
Other comprehensive items 18,272             18,128 144
Ending balance (in shares) at Jan. 02, 2021     14,624,159       3,081,919    
Ending balance at Jan. 02, 2021 $ 496,905   $ 146 $ 110,824 $ 479,400   $ (75,519) $ (19,492) $ 1,546