Loans and Allowance for Loan and Lease Losses (Schedule of Accretion of Purchased Impaired Loan) (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
		Sep. 30, 2017	Sep. 30, 2017
Accounts Notes Loans And Financing Receivable Gross Allowance And Net [Abstract]
Accretable yield, beginning balance		$ 68	$ 67
Accretable yield amortized to interest income		(3)	(25)
Reclassification from nonaccretable difference	[1]		23
Accretable yield, ending balance		$ 65	$ 65

[1] Reclassification from non-accretable difference represents an increase to the estimated cash flows to be collected on the underlying portfolio.