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CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($)
Total
Class A Common Stock
Additional paid-in Capital
Retained Earnings
Treasury Stock
Balance at Dec. 31, 2019 $ 162,195,000 $ 124,000 $ 55,869,000 $ 106,202,000  
Net income 4,271,000     4,271,000  
Cash dividends (1,244,000)     (1,244,000)  
Balance at Mar. 31, 2020 165,222,000 124,000 55,869,000 109,229,000  
Balance at Dec. 31, 2020 167,656,000 124,000 55,987,000 111,545,000  
Net income 4,685,000     4,685,000  
Cash dividends (2,490,000)     (2,490,000)  
Treasury stock:          
Acquired (755,000)       $ (755,000)
Retired     (755,000)   $ 755,000
Balance at Mar. 31, 2021 $ 169,096,000 $ 124,000 $ 55,232,000 $ 113,740,000