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Fair Value (Fair Value Measurement and Assumptions) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Assets:      
Impaired Loans $ 18,361,000 $ 2,955,000  
Non-financial assets:      
Other real estate owned 60,487,300 71,103,000  
Assumptions used in discounted cash flow model to determine fair value of investments classified within level 3      
Charges to allowance for probable loan losses in connection with other real estate owned 22,000 9,611,000 $ 170,000
Adjustment to fair value in connection with other real estate owned 1,539,000 322,000 $ 3,071,000
Impaired commercial collateral dependent receivables appraisals to determine fair value within immediately preceding twelve months 16,587,000 1,426,000  
Impaired collateral dependent commercial loans with internal evaluation completed within last twelve months 1,283,000 847,000  
Fair Value, Measurements, Nonrecurring [Member]      
Assets:      
Equity investments without a readily determinable fair value   28,166,000  
Assumptions used in discounted cash flow model to determine fair value of investments classified within level 3      
Change in net provision, impaired loans (86,000) 43,000  
Change in net provision, other real estate owned 1,539,000 322,000  
Change in net provision, equity investment without readily determinable fair value   4,775,000  
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]      
Assets:      
Impaired Loans 393,000 826,000  
Equity investments without a readily determinable fair value   28,166,000  
Non-financial assets:      
Other real estate owned 6,241,000 21,614,000  
Fair Value, Measurements, Nonrecurring [Member] | Estimate of Fair Value Measurement [Member]      
Assets:      
Impaired Loans 393,000 826,000  
Non-financial assets:      
Other real estate owned $ 6,241,000 $ 21,614,000