Fair Value Accounting (Schedule of Assets And Liabilities Measured at Fair Value on Nonrecurring Basis) (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Assets
Impaired loans	$ 12,226	$ 10,575
Other real estate owned	1,684
Total assets measured at fair value on a nonrecurring basis	13,910	10,575
Fair Value, Inputs, Level 1 [Member]
Assets
Impaired loans
Other real estate owned
Total assets measured at fair value on a nonrecurring basis
Fair Value, Inputs, Level 2 [Member]
Assets
Impaired loans	8,787	5,634
Other real estate owned	1,684
Total assets measured at fair value on a nonrecurring basis	10,471	5,634
Fair Value, Inputs, Level 3 [Member]
Assets
Impaired loans	3,439	4,941
Other real estate owned
Total assets measured at fair value on a nonrecurring basis	$ 3,439	$ 4,941