Loans - Loan Modifications by Concession Type (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) loan	Jun. 30, 2018 USD ($) loan	Jun. 30, 2019 USD ($) loan	Jun. 30, 2018 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	$ 5,443	$ 1,968	$ 14,442	$ 5,946
Total number of loans (in loan) | loan	37	35	70	81
Pre-modification recorded investment	$ 5,540	$ 2,002	$ 14,792	$ 6,042
Principal deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	433	1,337	3,857	2,702
Principal reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	70	84	274	107
Interest rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	1,345	516	1,815	2,363
Forbearance agreement
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	3,595	31	8,496	774
Commercial loan portfolio
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	$ 4,611	$ 1,521	$ 13,188	$ 5,026
Total number of loans (in loan) | loan	19	19	36	40
Pre-modification recorded investment	$ 4,677	$ 1,544	$ 13,482	$ 5,061
Commercial loan portfolio | Principal deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	170	1,110	3,273	2,081
Commercial loan portfolio | Principal reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	12	0	115	0
Commercial loan portfolio | Interest rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	834	380	1,304	2,171
Commercial loan portfolio | Forbearance agreement
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	3,595	31	8,496	774
Commercial loan portfolio | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	$ 3,803	$ 958	$ 8,159	$ 3,187
Total number of loans (in loan) | loan	13	13	24	31
Pre-modification recorded investment	$ 3,818	$ 969	$ 8,386	$ 3,204
Commercial loan portfolio | Commercial | Principal deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	14	740	388	1,643
Commercial loan portfolio | Commercial | Principal reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	12	0	12	0
Commercial loan portfolio | Commercial | Interest rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	426	218	867	1,283
Commercial loan portfolio | Commercial | Forbearance agreement
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	3,351	0	6,892	261
Commercial loan portfolio | Total commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	$ 808	$ 563	$ 5,029	$ 1,839
Total number of loans (in loan) | loan	6	6	12	9
Pre-modification recorded investment	$ 859	$ 575	$ 5,096	$ 1,857
Commercial loan portfolio | Total commercial real estate | Principal deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	156	370	2,885	438
Commercial loan portfolio | Total commercial real estate | Principal reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	0	0	103	0
Commercial loan portfolio | Total commercial real estate | Interest rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	408	162	437	888
Commercial loan portfolio | Total commercial real estate | Forbearance agreement
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	244	31	1,604	513
Consumer loan portfolio
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	$ 832	$ 447	$ 1,254	$ 920
Total number of loans (in loan) | loan	18	16	34	41
Pre-modification recorded investment	$ 863	$ 458	$ 1,310	$ 981
Consumer loan portfolio | Principal deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	263	227	584	621
Consumer loan portfolio | Principal reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	58	84	159	107
Consumer loan portfolio | Interest rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	511	136	511	192
Consumer loan portfolio | Forbearance agreement
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	0	0	0	0
Consumer loan portfolio | Residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	$ 411	$ 210	$ 653	$ 348
Total number of loans (in loan) | loan	4	3	6	7
Pre-modification recorded investment	$ 422	$ 215	$ 679	$ 357
Consumer loan portfolio | Residential mortgage | Principal deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	81	131	248	269
Consumer loan portfolio | Residential mortgage | Principal reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	0	40	75	40
Consumer loan portfolio | Residential mortgage | Interest rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	330	39	330	39
Consumer loan portfolio | Residential mortgage | Forbearance agreement
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	0	0	0	0
Consumer loan portfolio | Consumer installment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	$ 67	$ 69	$ 139	$ 191
Total number of loans (in loan) | loan	6	9	17	25
Pre-modification recorded investment	$ 70	$ 72	$ 149	$ 200
Consumer loan portfolio | Consumer installment | Principal deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	15	15	61	86
Consumer loan portfolio | Consumer installment | Principal reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	39	44	65	67
Consumer loan portfolio | Consumer installment | Interest rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	13	10	13	38
Consumer loan portfolio | Consumer installment | Forbearance agreement
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	0	0	0	0
Consumer loan portfolio | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	$ 354	$ 168	$ 462	$ 381
Total number of loans (in loan) | loan	8	4	11	9
Pre-modification recorded investment	$ 371	$ 171	$ 482	$ 424
Consumer loan portfolio | Home equity | Principal deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	167	81	275	266
Consumer loan portfolio | Home equity | Principal reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	19	0	19	0
Consumer loan portfolio | Home equity | Interest rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	168	87	168	115
Consumer loan portfolio | Home equity | Forbearance agreement
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	0	0	0	0
Owner-occupied | Commercial loan portfolio | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	$ 424	$ 563	$ 4,623	$ 1,771
Total number of loans (in loan) | loan	4	6	9	8
Pre-modification recorded investment	$ 436	$ 575	$ 4,649	$ 1,783
Owner-occupied | Commercial loan portfolio | Commercial | Principal deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	156	370	2,863	370
Owner-occupied | Commercial loan portfolio | Commercial | Principal reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	0	0	103	0
Owner-occupied | Commercial loan portfolio | Commercial | Interest rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	268	162	297	888
Owner-occupied | Commercial loan portfolio | Commercial | Forbearance agreement
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	0	$ 31	1,360	513
Non-owner occupied | Commercial loan portfolio | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	$ 140		$ 140	$ 68
Total number of loans (in loan) | loan	1		1	1
Pre-modification recorded investment	$ 154		$ 154	$ 74
Non-owner occupied | Commercial loan portfolio | Commercial | Principal deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	0		0	68
Non-owner occupied | Commercial loan portfolio | Commercial | Principal reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	0		0	0
Non-owner occupied | Commercial loan portfolio | Commercial | Interest rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	140		140	0
Non-owner occupied | Commercial loan portfolio | Commercial | Forbearance agreement
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	0		0	$ 0
Vacant land | Commercial loan portfolio | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	$ 244		$ 266
Total number of loans (in loan) | loan	1		2
Pre-modification recorded investment	$ 269		$ 293
Vacant land | Commercial loan portfolio | Commercial | Principal deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	0		22
Vacant land | Commercial loan portfolio | Commercial | Principal reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	0		0
Vacant land | Commercial loan portfolio | Commercial | Interest rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	0		0
Vacant land | Commercial loan portfolio | Commercial | Forbearance agreement
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification recorded investment	$ 244		$ 244