Loans (Schedule of Accretable Yield, or Income Expected to be Collected) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at January 1	$ 2,521	$ 1,279	$ 1,685
New Loans Purchased	0	1,395	0
Accretion of Income	(425)	(943)	(483)
Reclassifications from Non-accretable Difference	638	985	104
Charge-off of Accretable Yield	0	(195)	(27)
Balance at December 31	$ 2,734	$ 2,521	$ 1,279