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Other Assets Other Assets (Investments in Limited Partnerships) (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Schedule of Equity Method Investments      
Investment in limited partnerships $ 9,874,000 $ 9,874,000 $ 6,673,000
Income from Equity Method Investments 520,000 2,500,000  
Loss on Equity Method Investments 99,000 24,000  
Aldine Capital Fund, LP      
Schedule of Equity Method Investments      
Investment in limited partnerships     60,000
Aldine Capital Fund II, LP      
Schedule of Equity Method Investments      
Investment in limited partnerships 4,900,000 4,900,000 3,500,000
Remaining commitment on Equity Method Investments 1,300,000 1,300,000  
Original Commitment to Equity Method Investments 5,000,000 5,000,000  
Aldine Capital Fund III, LP      
Schedule of Equity Method Investments      
Investment in limited partnerships 4,500,000 4,500,000 2,800,000
Remaining commitment on Equity Method Investments 1,100,000 1,100,000  
Original Commitment to Equity Method Investments 5,000,000 5,000,000  
Dane Workforce Housing Fund LLC      
Schedule of Equity Method Investments      
Investment in limited partnerships 367,000 367,000 275,000
Income from Equity Method Investments   2,000 0
Loss on Equity Method Investments   19,000 0
Remaining commitment on Equity Method Investments 615,000 615,000  
Original Commitment to Equity Method Investments 1,000,000 1,000,000  
BankTech Ventures, LP      
Schedule of Equity Method Investments      
Investment in limited partnerships 120,000 120,000  
Income from Equity Method Investments   0 0
Loss on Equity Method Investments   0 $ 0
Remaining commitment on Equity Method Investments 880,000 880,000  
Original Commitment to Equity Method Investments $ 1,000,000 $ 1,000,000