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, 2019	Dec. 31, 2018
Assets
Impaired loans	$ 11,305	$ 10,558
Total assets measured at fair value on a nonrecurring basis	11,305	10,558
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	4,357	2,190
Total assets measured at fair value on a nonrecurring basis	4,357	2,190
Fair Value, Inputs, Level 3 [Member]
Assets
Impaired loans	6,948	8,368
Total assets measured at fair value on a nonrecurring basis	$ 6,948	$ 8,368