Loans (Troubled Debt Restructurings) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) contract	Sep. 30, 2017 USD ($) contract	Sep. 30, 2018 USD ($) contract	Sep. 30, 2017 USD ($) contract
Acquired Loans
Financing Receivable, Modifications [Line Items]
Total Recorded Investment	$ 326	$ 95	$ 1,430	$ 860
Financing Receivable, Modifications, Number of Contracts | contract	4	3	21	17
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 326	$ 95	$ 1,448	$ 873
Financing Receivable, Modifications, Post-Modification Recorded Investment	326	95	1,448	873
Acquired Loans | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total Recorded Investment			$ 47
Financing Receivable, Modifications, Number of Contracts | contract			1
Financing Receivable, Modifications, Pre-Modification Recorded Investment			$ 50
Financing Receivable, Modifications, Post-Modification Recorded Investment			50
Acquired Loans | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total Recorded Investment				$ 265
Financing Receivable, Modifications, Number of Contracts | contract				2
Financing Receivable, Modifications, Pre-Modification Recorded Investment				$ 271
Financing Receivable, Modifications, Post-Modification Recorded Investment				271
Acquired Loans | Residential real estate
Financing Receivable, Modifications [Line Items]
Total Recorded Investment	$ 272	$ 61	$ 1,244	$ 263
Financing Receivable, Modifications, Number of Contracts | contract	3	2	15	8
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 272	$ 61	$ 1,258	$ 264
Financing Receivable, Modifications, Post-Modification Recorded Investment	272	61	1,258	264
Acquired Loans | Home equity lines of credit
Financing Receivable, Modifications [Line Items]
Total Recorded Investment	$ 54	$ 34	$ 139	$ 323
Financing Receivable, Modifications, Number of Contracts | contract	1	1	5	5
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 54	$ 34	$ 140	$ 328
Financing Receivable, Modifications, Post-Modification Recorded Investment	54	34	140	328
Acquired Loans | Consumer, direct
Financing Receivable, Modifications [Line Items]
Total Recorded Investment				$ 9
Financing Receivable, Modifications, Number of Contracts | contract				2
Financing Receivable, Modifications, Pre-Modification Recorded Investment				$ 10
Financing Receivable, Modifications, Post-Modification Recorded Investment				10
Financial Asset Originated [Member]
Financing Receivable, Modifications [Line Items]
Total Recorded Investment	$ 768	$ 188	$ 1,871	$ 997
Financing Receivable, Modifications, Number of Contracts | contract	14	11	46	31
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 770	$ 191	$ 1,917	$ 1,099
Financing Receivable, Modifications, Post-Modification Recorded Investment	770	191	1,917	1,099
Financial Asset Originated [Member] | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total Recorded Investment				$ 14
Financing Receivable, Modifications, Number of Contracts | contract				1
Financing Receivable, Modifications, Pre-Modification Recorded Investment				$ 14
Financing Receivable, Modifications, Post-Modification Recorded Investment				14
Financial Asset Originated [Member] | Residential real estate
Financing Receivable, Modifications [Line Items]
Total Recorded Investment	$ 87	$ 90	$ 871	$ 478
Financing Receivable, Modifications, Number of Contracts | contract	3	1	9	7
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 87	$ 90	$ 871	$ 483
Financing Receivable, Modifications, Post-Modification Recorded Investment	87	90	871	483
Financial Asset Originated [Member] | Home equity lines of credit
Financing Receivable, Modifications [Line Items]
Total Recorded Investment	$ 531	$ 19	$ 562	$ 286
Financing Receivable, Modifications, Number of Contracts | contract	4	2	6	6
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 533	$ 22	$ 565	$ 291
Financing Receivable, Modifications, Post-Modification Recorded Investment	533	22	565	291
Financial Asset Originated [Member] | Consumer, direct
Financing Receivable, Modifications [Line Items]
Total Recorded Investment		$ 9	$ 18	$ 10
Financing Receivable, Modifications, Number of Contracts | contract		2	5	3
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 9	$ 27	$ 10
Financing Receivable, Modifications, Post-Modification Recorded Investment		9	27	10
Financial Asset Originated [Member] | Consumer, direct
Financing Receivable, Modifications [Line Items]
Total Recorded Investment		$ 43	$ 438	$ 96
Financing Receivable, Modifications, Number of Contracts | contract		7	31	14
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 43	$ 481	$ 137
Financing Receivable, Modifications, Post-Modification Recorded Investment		43	481	137
Financial Asset Originated [Member] | Consumer, indirect
Financing Receivable, Modifications [Line Items]
Total Recorded Investment	$ 150	$ 34	$ 420	$ 86
Financing Receivable, Modifications, Number of Contracts | contract	7	5	26	11
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 150	$ 34	$ 454	$ 127
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 150	34	$ 454	127
Financial Asset Originated [Member] | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Total Recorded Investment		$ 36		$ 123
Financing Receivable, Modifications, Number of Contracts | contract		1		3
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 36		$ 174
Financing Receivable, Modifications, Post-Modification Recorded Investment		$ 36		$ 174