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Investments, Summary (Details) - USD ($)
12 Months Ended
Nov. 30, 2013
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Investments [Abstract]        
Net unrealized losses arising prior to reclassification date $ 15,100,000      
Amortization of other comprehensive loss   $ 897,073 $ 1,400,000 $ 1,200,000
Accumulated other comprehensive loss   3,283,551 11,130,612  
Obligations of States and Political Subdivisions [Member]        
Investments [Abstract]        
Aggregate fair value of bond held   284,900,000 263,600,000  
Amortized cost of bond held   272,700,000 247,500,000  
Special Revenue Bonds [Member]        
Investments [Abstract]        
Aggregate fair value of bond held   160,800,000 140,800,000  
Amortized cost of bond held   $ 154,200,000 $ 131,100,000  
Education Bonds [Member]        
Investments [Abstract]        
Percentage of investments in special revenue bonds   48.00% 44.00%  
Water and Sewer Utility Bonds [Member]        
Investments [Abstract]        
Percentage of investments in special revenue bonds   35.00% 39.00%  
Accumulated Net Unrealized Investment Losses [Member]        
Investments [Abstract]        
Accumulated other comprehensive loss   $ 5,200,000 $ 6,100,000  
Minimum [Member]        
Investments [Abstract]        
Percentage of which the company held security of any issuer   10.00% 10.00%