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Stockholders' Equity and Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2020
Equity [Abstract]  
Schedule of Earnings Per Share The weighted average number of shares of Class A common stock and Class B common stock outstanding used to calculate basic and diluted earnings per share were as follows:
 20202019
Basic weighted average shares outstanding7,026 6,974 
Dilutive effect of restricted stock awards31 33 
Diluted weighted average shares outstanding7,057 7,007 
Basic earnings per share$2.11 $5.68 
Diluted earnings per share$2.10 $5.66