XML 41 R31.htm IDEA: XBRL DOCUMENT v3.20.2
Investment and Mortgage-Backed Securities, Available for Sale (Schedule of Available for Sale Securities) (Details) - USD ($)
6 Months Ended 9 Months Ended
Jun. 30, 2020
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]        
Available-for-sale Securities, Gross Realized Losses   $ 0 $ 288,000  
Available For Sale Securities Pledged as Collateral, Amortized Cost Basis   226,000,000.0   $ 171,400,000
Pledged Assets Separately Reported, Other Debt Securities Available-for-sale or Held-for-investment   236,700,000   173,100,000
Amortized Cost of Investment And Mortgage-Backed Securities Available For Sale   487,758,799   408,695,280
Available-for-sale Securities, Gross Unrealized Gains $ 8,410,493 19,259,363    
Available-for-sale Securities, Gross Unrealized Losses 2,460,933 2,215,839    
Available-for-sale Securities, Fair Value Disclosure   504,802,323   414,644,840
Proceeds From Sale of Available For Sale Securities Including Mortgage Backed Securities   25,000,000.0 70,800,000  
US States and Political Subdivisions Debt Securities [Member]        
Debt Securities, Available-for-sale [Line Items]        
Amortized Cost of Investment And Mortgage-Backed Securities Available For Sale   38,897,580   43,153,086
Available-for-sale Securities, Gross Unrealized Gains 4,088,408 5,318,422    
Available-for-sale Securities, Gross Unrealized Losses 0 0    
Mortgage-backed Securities, Issued by Private Enterprises [Member]        
Debt Securities, Available-for-sale [Line Items]        
Amortized Cost of Investment And Mortgage-Backed Securities Available For Sale   29,100,000   15,800,000
Available-for-sale Securities, Fair Value Disclosure   29,900,000    
Investments [Member]        
Debt Securities, Available-for-sale [Line Items]        
Available-for-sale Securities, Gross Realized Gains 0 1,300,000 $ 1,300,000  
Collateralized Loan Obligations [Member]        
Debt Securities, Available-for-sale [Line Items]        
Amortized Cost of Investment And Mortgage-Backed Securities Available For Sale   60,858,231   41,088,231
Available-for-sale Securities, Gross Unrealized Losses 856,401 855,725    
Available-for-sale Securities, Gross Realized Gains   78,338    
SBA Bonds        
Debt Securities, Available-for-sale [Line Items]        
Amortized Cost of Investment And Mortgage-Backed Securities Available For Sale   122,923,679   111,927,938
Available-for-sale Securities, Gross Unrealized Gains 622,105 742,872    
Available-for-sale Securities, Gross Unrealized Losses 656,944 755,980    
Mortgage-Backed Securities        
Debt Securities, Available-for-sale [Line Items]        
Amortized Cost of Investment And Mortgage-Backed Securities Available For Sale   230,490,030   197,356,288
Available-for-sale Securities, Gross Unrealized Gains 3,664,621 11,657,846    
Available-for-sale Securities, Gross Unrealized Losses 582,902 526,563    
Taxable Municipal Bonds [Member]        
Debt Securities, Available-for-sale [Line Items]        
Amortized Cost of Investment And Mortgage-Backed Securities Available For Sale   34,556,245   15,169,737
Available-for-sale Securities, Gross Unrealized Gains 35,359 1,461,885    
Available-for-sale Securities, Gross Unrealized Losses $ 364,686 77,571    
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member]        
Debt Securities, Available-for-sale [Line Items]        
Available-for-sale Securities, Fair Value Disclosure   44,216,002   47,241,494
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Collateralized Loan Obligations [Member]        
Debt Securities, Available-for-sale [Line Items]        
Available-for-sale Securities, Fair Value Disclosure   60,080,844   40,231,830
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | SBA Bonds        
Debt Securities, Available-for-sale [Line Items]        
Available-for-sale Securities, Fair Value Disclosure   122,910,571   111,893,099
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage-Backed Securities        
Debt Securities, Available-for-sale [Line Items]        
Available-for-sale Securities, Fair Value Disclosure   241,621,313   200,438,007
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Taxable Municipal Bonds [Member]        
Debt Securities, Available-for-sale [Line Items]        
Available-for-sale Securities, Fair Value Disclosure   $ 35,940,559   $ 14,840,410