Loans and Leases - Troubled Debt Restructurings (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) contract	Dec. 31, 2017 USD ($) contract
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings | $	$ 10,962	$ 9,089
Number of contracts	17	10
Pre-modification outstanding recorded investment | $	$ 6,369	$ 1,114
Post-modification outstanding recorded investment | $	$ 6,389	$ 1,114
Loan Term Extension
Financing Receivable, Modifications [Line Items]
Number of contracts	4	1
Interest Rate Change and Term Extension
Financing Receivable, Modifications [Line Items]
Number of contracts	5	1
Interest Rate Change and/or Interest-Only Period
Financing Receivable, Modifications [Line Items]
Number of contracts	0	4
Contractual Payment Reduction (Leases only)
Financing Receivable, Modifications [Line Items]
Number of contracts	4	4
Temporary Payment Deferral
Financing Receivable, Modifications [Line Items]
Number of contracts	4	0
Commercial Mortgage
Financing Receivable, Modifications [Line Items]
Number of contracts	1
Pre-modification outstanding recorded investment | $	$ 4,439
Post-modification outstanding recorded investment | $	$ 4,439
Commercial Mortgage | Loan Term Extension
Financing Receivable, Modifications [Line Items]
Number of contracts	1
Commercial Mortgage | Interest Rate Change and Term Extension
Financing Receivable, Modifications [Line Items]
Number of contracts	0
Commercial Mortgage | Interest Rate Change and/or Interest-Only Period
Financing Receivable, Modifications [Line Items]
Number of contracts	0
Commercial Mortgage | Contractual Payment Reduction (Leases only)
Financing Receivable, Modifications [Line Items]
Number of contracts	0
Commercial Mortgage | Temporary Payment Deferral
Financing Receivable, Modifications [Line Items]
Number of contracts	0
Home equity lines and loans
Financing Receivable, Modifications [Line Items]
Number of contracts	3	3
Pre-modification outstanding recorded investment | $	$ 961	$ 582
Post-modification outstanding recorded investment | $	961	$ 582
Loans previously modified to TDR charged off | $	$ 25
Home equity lines and loans | Loan Term Extension
Financing Receivable, Modifications [Line Items]
Number of contracts	0	0
Home equity lines and loans | Interest Rate Change and Term Extension
Financing Receivable, Modifications [Line Items]
Number of contracts	3	0
Home equity lines and loans | Interest Rate Change and/or Interest-Only Period
Financing Receivable, Modifications [Line Items]
Number of contracts	0	3
Home equity lines and loans | Contractual Payment Reduction (Leases only)
Financing Receivable, Modifications [Line Items]
Number of contracts	0	0
Home equity lines and loans | Temporary Payment Deferral
Financing Receivable, Modifications [Line Items]
Number of contracts	0	0
Residential mortgage
Financing Receivable, Modifications [Line Items]
Number of contracts	6	3
Pre-modification outstanding recorded investment | $	$ 620	$ 432
Post-modification outstanding recorded investment | $	$ 640	$ 432
Residential mortgage | Loan Term Extension
Financing Receivable, Modifications [Line Items]
Number of contracts	2	1
Residential mortgage | Interest Rate Change and Term Extension
Financing Receivable, Modifications [Line Items]
Number of contracts	1	1
Residential mortgage | Interest Rate Change and/or Interest-Only Period
Financing Receivable, Modifications [Line Items]
Number of contracts	0	1
Residential mortgage | Contractual Payment Reduction (Leases only)
Financing Receivable, Modifications [Line Items]
Number of contracts	0	0
Residential mortgage | Temporary Payment Deferral
Financing Receivable, Modifications [Line Items]
Number of contracts	3	0
Commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of contracts	2
Pre-modification outstanding recorded investment | $	$ 156
Post-modification outstanding recorded investment | $	$ 156
Commercial and industrial | Loan Term Extension
Financing Receivable, Modifications [Line Items]
Number of contracts	1
Commercial and industrial | Interest Rate Change and Term Extension
Financing Receivable, Modifications [Line Items]
Number of contracts	1
Commercial and industrial | Interest Rate Change and/or Interest-Only Period
Financing Receivable, Modifications [Line Items]
Number of contracts	0
Commercial and industrial | Contractual Payment Reduction (Leases only)
Financing Receivable, Modifications [Line Items]
Number of contracts	0
Commercial and industrial | Temporary Payment Deferral
Financing Receivable, Modifications [Line Items]
Number of contracts	0
Consumer
Financing Receivable, Modifications [Line Items]
Number of contracts	1
Pre-modification outstanding recorded investment | $	$ 20
Post-modification outstanding recorded investment | $	$ 20
Consumer | Loan Term Extension
Financing Receivable, Modifications [Line Items]
Number of contracts	0
Consumer | Interest Rate Change and Term Extension
Financing Receivable, Modifications [Line Items]
Number of contracts	0
Consumer | Interest Rate Change and/or Interest-Only Period
Financing Receivable, Modifications [Line Items]
Number of contracts	0
Consumer | Contractual Payment Reduction (Leases only)
Financing Receivable, Modifications [Line Items]
Number of contracts	0
Consumer | Temporary Payment Deferral
Financing Receivable, Modifications [Line Items]
Number of contracts	1
Leases
Financing Receivable, Modifications [Line Items]
Number of contracts	4	4
Pre-modification outstanding recorded investment | $	$ 173	$ 100
Post-modification outstanding recorded investment | $	173	$ 100
Loans previously modified to TDR charged off | $	$ 49
Leases | Loan Term Extension
Financing Receivable, Modifications [Line Items]
Number of contracts	0	0
Leases | Interest Rate Change and Term Extension
Financing Receivable, Modifications [Line Items]
Number of contracts	0	0
Leases | Interest Rate Change and/or Interest-Only Period
Financing Receivable, Modifications [Line Items]
Number of contracts	0	0
Leases | Contractual Payment Reduction (Leases only)
Financing Receivable, Modifications [Line Items]
Number of contracts	4	4
Leases | Temporary Payment Deferral
Financing Receivable, Modifications [Line Items]
Number of contracts	0	0
Nonperforming Financial Instruments
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings | $	$ 1,217	$ 3,289
Performing Financial Instruments
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings | $	$ 9,745	$ 5,800