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Stockholders' Equity and Earnings Per Share (Textual) (Details)
 12 Months Ended
Dec. 31, 2019
USD ($)
vote
shares
Dec. 31, 2018
USD ($)
shares
Nov. 06, 2019
USD ($)
2019 and 2018 Stock Repurchase Programs      
Class of Stock [Line Items]      
Aggregate purchase price $ 3,000,000    
2019 Stock Repurchase Program      
Class of Stock [Line Items]      
Authorized amount available for repurchase     $ 25,000,000
Class A Common Stock      
Class of Stock [Line Items]      
Votes per share | vote 1    
Common stock, shares authorized (in shares) | shares 25,000,000    
Treasury stock (in shares) | shares 2,817,714 2,862,442  
Class A Common Stock | 2018 Stock Repurchase Program      
Class of Stock [Line Items]      
Treasury stock, value $ 44,476    
Aggregate purchase price   $ 1,300,000  
Treasury stock, shares acquired (in shares) | shares   39,047  
Class A Common Stock | 2019 Stock Repurchase Program      
Class of Stock [Line Items]      
Treasury stock, value $ 28,094    
Class B Common Stock      
Class of Stock [Line Items]      
Votes per share | vote 10    
Common stock, shares authorized (in shares) | shares 6,756,176