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Fair Value Accounting (Schedule of Assets And Liabilities Measured at Fair Value on Nonrecurring Basis) (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Assets    
Impaired loans $ 16,044 $ 10,575
Total assets measured at fair value on a nonrecurring basis 16,044 10,575
Fair Value, Inputs, Level 1 [Member]    
Assets    
Impaired loans
Total assets measured at fair value on a nonrecurring basis
Fair Value, Inputs, Level 2 [Member]    
Assets    
Impaired loans 10,552 5,634
Total assets measured at fair value on a nonrecurring basis 10,552 5,634
Fair Value, Inputs, Level 3 [Member]    
Assets    
Impaired loans 5,492 4,941
Total assets measured at fair value on a nonrecurring basis $ 5,492 $ 4,941