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Securities (Narrative) (Details)
12 Months Ended
Dec. 31, 2020
USD ($)
security
Dec. 31, 2019
USD ($)
security
Schedule of Available-for-sale Securities [Line Items]    
Other-than-temporary impairment $ 0 $ 0
Sales of securities $ 0 $ 0
Holdings of securities greater than 10% of stockholders' equity | security 0 0
Securities with unrealized losses | security 0  
Equity securities $ 5,000,000  
U.S. Government-Sponsored Entities And Agencies [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Minimum percentage of securities held 10.00% 10.00%