Loans Loans (Schedule of Acquired Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Total Outstanding Balance	$ 164,795	$ 226,054
Acquired Loans Carrying Value	162,367	223,323
Commercial Portfolio Segment [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Carrying Value	7,969	25,134
Owner Occupied [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Carrying Value	19,302	22,582
Non-Owner Occupied [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Carrying Value	29,806	35,130
Land and Land Improvements [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Carrying Value	6,066	7,512
Construction Loans [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Carrying Value	0	2,760
Non-Jumbo [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Carrying Value	85,889	111,055
Jumbo [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Carrying Value	3,574	4,399
Home Equity [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Carrying Value	2,839	3,311
Consumer Portfolio Segment [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Carrying Value	6,793	11,229
Other Loans [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Carrying Value	129	211
Purchased Impaired Loans [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	5,228	5,923
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	4,379	5,019
Purchased Impaired Loans [Member] | Commercial Portfolio Segment [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	0	9
Purchased Impaired Loans [Member] | Owner Occupied [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	682	689
Purchased Impaired Loans [Member] | Non-Owner Occupied [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	1,314	1,837
Purchased Impaired Loans [Member] | Land and Land Improvements [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	0	0
Purchased Impaired Loans [Member] | Construction Loans [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	0	0
Purchased Impaired Loans [Member] | Non-Jumbo [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	1,407	1,485
Purchased Impaired Loans [Member] | Jumbo [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	976	999
Purchased Impaired Loans [Member] | Home Equity [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	0	0
Purchased Impaired Loans [Member] | Consumer Portfolio Segment [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	0	0
Purchased Impaired Loans [Member] | Other Loans [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	0	0
Purchase Nonimpaired Loans [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Purchase Performing Outstanding Balance	159,567	220,131
Acquired Loans Purchased Performing Carrying Value	157,988	218,304
Purchase Nonimpaired Loans [Member] | Commercial Portfolio Segment [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Purchased Performing Carrying Value	7,969	25,125
Purchase Nonimpaired Loans [Member] | Owner Occupied [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Purchased Performing Carrying Value	18,620	21,893
Purchase Nonimpaired Loans [Member] | Non-Owner Occupied [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Purchased Performing Carrying Value	28,492	33,293
Purchase Nonimpaired Loans [Member] | Land and Land Improvements [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Purchased Performing Carrying Value	6,066	7,512
Purchase Nonimpaired Loans [Member] | Construction Loans [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Purchased Performing Carrying Value	0	2,760
Purchase Nonimpaired Loans [Member] | Non-Jumbo [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Purchased Performing Carrying Value	84,482	109,570
Purchase Nonimpaired Loans [Member] | Jumbo [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Purchased Performing Carrying Value	2,598	3,400
Purchase Nonimpaired Loans [Member] | Home Equity [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Purchased Performing Carrying Value	2,839	3,311
Purchase Nonimpaired Loans [Member] | Consumer Portfolio Segment [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Purchased Performing Carrying Value	6,793	11,229
Purchase Nonimpaired Loans [Member] | Other Loans [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Acquired Loans Purchased Performing Carrying Value	$ 129	$ 211