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Other Assets Other Assets (Investments in Limited Partnerships) (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Schedule of Equity Method Investments      
Investment in limited partnerships $ 6,673,000 $ 6,673,000 $ 4,476,000
Income from Equity Method Investments 1,400,000 520,000  
Loss on Equity Method Investments 121,000 99,000  
Aldine Capital Fund, LP      
Schedule of Equity Method Investments      
Investment in limited partnerships 60,000 60,000 54,000
Aldine Capital Fund II, LP      
Schedule of Equity Method Investments      
Investment in limited partnerships 3,500,000 3,500,000 3,100,000
Aldine Capital Fund III, LP      
Schedule of Equity Method Investments      
Investment in limited partnerships 2,800,000 2,800,000 $ 1,300,000
Dane Workforce Housing Fund LLC      
Schedule of Equity Method Investments      
Investment in limited partnerships $ 275,000 $ 275,000