Loans Loans, Troubled Debt Restructuring, Modification Type (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 199	$ 0	$ 199	$ 23
Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Commercial, secured by real estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	199	0	199	9
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	14
Troubled Debt Restructurings, Interest Only Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Troubled Debt Restructurings, Interest Only Modification [Member] | Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Troubled Debt Restructurings, Interest Only Modification [Member] | Commercial, secured by real estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Troubled Debt Restructurings, Interest Only Modification [Member] | Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Troubled Debt Restructurings, Interest Only Modification [Member] | Consumer [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Principal Forgiveness [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	9
Principal Forgiveness [Member] | Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Principal Forgiveness [Member] | Commercial, secured by real estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Principal Forgiveness [Member] | Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	9
Principal Forgiveness [Member] | Consumer [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Troubled Debt Restructurings, Combination Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Troubled Debt Restructurings, Combination Modification [Member] | Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Troubled Debt Restructurings, Combination Modification [Member] | Commercial, secured by real estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Troubled Debt Restructurings, Combination Modification [Member] | Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Troubled Debt Restructurings, Combination Modification [Member] | Consumer [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Extended Maturity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	199	0	199	14
Extended Maturity [Member] | Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Extended Maturity [Member] | Commercial, secured by real estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Extended Maturity [Member] | Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	199	0	199	0
Extended Maturity [Member] | Consumer [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	14
Contractual Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Contractual Interest Rate Reduction [Member] | Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Contractual Interest Rate Reduction [Member] | Commercial, secured by real estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Contractual Interest Rate Reduction [Member] | Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Contractual Interest Rate Reduction [Member] | Consumer [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0