Loans Loans, Troubled Debt Restructuring, Modification Type (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	$ 0	$ 342	$ 23	$ 786
Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	0	0
Commercial, secured by real estate [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	304	0	676
Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	27	9	72
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	11	14	38
Term Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	14	18
Term Modification [Member] | Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	0	0
Term Modification [Member] | Commercial, secured by real estate [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	0	0
Term Modification [Member] | Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	0	18
Term Modification [Member] | Consumer [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	14	0
Rate Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	0	54
Rate Modification [Member] | Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	0	0
Rate Modification [Member] | Commercial, secured by real estate [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	0	0
Rate Modification [Member] | Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	0	27
Rate Modification [Member] | Consumer [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	0	27
Interest Only [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	304	0	304
Interest Only [Member] | Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	0	0
Interest Only [Member] | Commercial, secured by real estate [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	304	0	304
Interest Only [Member] | Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	0	0
Interest Only [Member] | Consumer [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	0	0
Principal Forgiveness [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	9	0
Principal Forgiveness [Member] | Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	0	0
Principal Forgiveness [Member] | Commercial, secured by real estate [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	0	0
Principal Forgiveness [Member] | Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	9	0
Principal Forgiveness [Member] | Consumer [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	0	0
Combination [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	38	0	410
Combination [Member] | Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	0	0
Combination [Member] | Commercial, secured by real estate [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	0	0	372
Combination [Member] | Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	0	27	0	27
Combination [Member] | Consumer [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Recorded Balance	$ 0	$ 11	$ 0	$ 11