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Stock Compensation Plans, Equity Incentive Plans (Details) - USD ($)
12 Months Ended
Jan. 04, 2021
Jan. 02, 2020
Jan. 02, 2019
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2011
Equity Incentive Plans [Abstract]              
Compensation expense in stock compensation plans       $ 965,701 $ 1,100,000 $ 1,400,000  
Income tax benefit of stock compensation plans       202,797 229,698 288,901  
Unrecognized compensation expense related to nonvested share-based compensation granted under the plan       $ 1,500,000 1,600,000    
Weighted average period of unrecognized compensation expense       1 year 10 months 24 days      
Cash from option exercises       $ 12,300,000 17,500,000 2,900,000  
Tax benefit for tax deductions from option exercises       $ 438,850 $ 302,901 $ 64,765  
Equity Incentive Plan [Member]              
Equity Incentive Plans [Abstract]              
Restricted shares issued to directors (in shares)       500      
Weighted-average grant date fair value of options granted (in dollars per share)       $ 1.21 $ 1.15 $ 1.15  
Fair value of risk-free interest rate       0.91% 0.20% 1.64%  
Expected life       3 years 3 years 3 years  
Expected volatility       20.00% 20.00% 17.00%  
Expected dividend yield       4.00% 4.00% 4.00%  
Shares available for future option grants (in shares)       2,200,000      
Equity Incentive Plan [Member] | Maximum [Member]              
Equity Incentive Plans [Abstract]              
Exercisable period of stock options       5 years      
Equity Incentive Plan [Member] | Class A Common Stock [Member]              
Equity Incentive Plans [Abstract]              
Common stock available for issuance to employees of subsidiaries and affiliates under identical plan (in shares)           4,500,000  
Common stock available for issuance to directors and those of the subsidiaries and affiliates under identical plan (in shares)             500,000
Equity Incentive Plan [Member] | Restricted Stock [Member]              
Equity Incentive Plans [Abstract]              
Shares issued (in shares) 10,000 8,500 8,500