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Investment Securities (Details Narrative) - USD ($)
6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Marketable Securities [Line Items]      
Debt Securities, Available-for-Sale $ 337,254,000    
Federal Home Loan Bank Stock 792,100   $ 698,400
Corporate Fixed To Float Bonds [Member]      
Marketable Securities [Line Items]      
Debt Securities, Available-for-Sale 8,300,000   8,000,000.0
Mutual Funds [Member]      
Marketable Securities [Line Items]      
Debt Securities, Available-for-Sale 10,700   11,600
Available-for-Sale Securities, Gross Realized Gains 900 $ 1,700  
Debt Security, Corporate, Non-US [Member]      
Marketable Securities [Line Items]      
Debt Securities, Available-for-Sale 10,000.0   10,000.0
Corporate Bond Securities [Member]      
Marketable Securities [Line Items]      
Debt Securities, Available-for-Sale 1,000,000.0   1,000,000.0
Venture Capital Funds [Member]      
Marketable Securities [Line Items]      
Debt Securities, Available-for-Sale 136,700   86,700
Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member]      
Marketable Securities [Line Items]      
Security Owned and Pledged as Collateral, Amortized Cost 413,800,000    
Financial Instruments, Owned, at Fair Value 397,900,000   429,000,000.0
Mortgage-Backed Securities, Issued by Private Enterprises [Member]      
Marketable Securities [Line Items]      
Security Owned and Pledged as Collateral, Amortized Cost 41,500   48,200
Financial Instruments, Owned, at Fair Value $ 41,700   $ 46,400