Loans - Loan Modifications by Concession Type (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) loan	Mar. 31, 2018 USD ($) loan
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	$ 8,999	$ 3,978
Total number of loans (in loan) | loan	33	46
Pre-modification recorded investment	$ 9,252	$ 4,040
Principal deferral
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	3,424	1,365
Principal reduction
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	204	23
Interest rate
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	470	1,847
Forbearance agreement
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	4,901	743
Commercial loan portfolio
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	$ 8,577	$ 3,505
Total number of loans (in loan) | loan	17	21
Pre-modification recorded investment	$ 8,805	$ 3,517
Commercial loan portfolio | Principal deferral
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	3,103	971
Commercial loan portfolio | Principal reduction
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	103	0
Commercial loan portfolio | Interest rate
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	470	1,791
Commercial loan portfolio | Forbearance agreement
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	4,901	743
Commercial loan portfolio | Commercial
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	$ 4,356	$ 2,229
Total number of loans (in loan) | loan	11	18
Pre-modification recorded investment	$ 4,568	$ 2,235
Commercial loan portfolio | Commercial | Principal deferral
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	374	903
Commercial loan portfolio | Commercial | Principal reduction
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	0	0
Commercial loan portfolio | Commercial | Interest rate
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	441	1,065
Commercial loan portfolio | Commercial | Forbearance agreement
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	3,541	261
Commercial loan portfolio | Total commercial real estate
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	$ 4,221	$ 1,276
Total number of loans (in loan) | loan	6	3
Pre-modification recorded investment	$ 4,237	$ 1,282
Commercial loan portfolio | Total commercial real estate | Principal deferral
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	2,729	68
Commercial loan portfolio | Total commercial real estate | Principal reduction
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	103	0
Commercial loan portfolio | Total commercial real estate | Interest rate
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	29	726
Commercial loan portfolio | Total commercial real estate | Forbearance agreement
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	1,360	482
Consumer loan portfolio
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	$ 422	$ 473
Total number of loans (in loan) | loan	16	25
Pre-modification recorded investment	$ 447	$ 523
Consumer loan portfolio | Principal deferral
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	321	394
Consumer loan portfolio | Principal reduction
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	101	23
Consumer loan portfolio | Interest rate
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	0	56
Consumer loan portfolio | Forbearance agreement
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	0	0
Consumer loan portfolio | Residential mortgage
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	$ 242	$ 138
Total number of loans (in loan) | loan	2	4
Pre-modification recorded investment	$ 257	$ 142
Consumer loan portfolio | Residential mortgage | Principal deferral
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	167	138
Consumer loan portfolio | Residential mortgage | Principal reduction
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	75	0
Consumer loan portfolio | Residential mortgage | Interest rate
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	0	0
Consumer loan portfolio | Residential mortgage | Forbearance agreement
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	0	0
Consumer loan portfolio | Consumer installment
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	$ 72	$ 122
Total number of loans (in loan) | loan	11	16
Pre-modification recorded investment	$ 79	$ 128
Consumer loan portfolio | Consumer installment | Principal deferral
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	46	71
Consumer loan portfolio | Consumer installment | Principal reduction
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	26	23
Consumer loan portfolio | Consumer installment | Interest rate
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	0	28
Consumer loan portfolio | Consumer installment | Forbearance agreement
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	0	0
Consumer loan portfolio | Home equity
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	$ 108	$ 213
Total number of loans (in loan) | loan	3	5
Pre-modification recorded investment	$ 111	$ 253
Consumer loan portfolio | Home equity | Principal deferral
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	108	185
Consumer loan portfolio | Home equity | Principal reduction
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	0	0
Consumer loan portfolio | Home equity | Interest rate
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	0	28
Consumer loan portfolio | Home equity | Forbearance agreement
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	0	0
Owner-occupied | Commercial loan portfolio | Commercial
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	$ 4,199	$ 1,208
Total number of loans (in loan) | loan	5	2
Pre-modification recorded investment	$ 4,213	$ 1,208
Owner-occupied | Commercial loan portfolio | Commercial | Principal deferral
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	2,707	0
Owner-occupied | Commercial loan portfolio | Commercial | Principal reduction
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	103	0
Owner-occupied | Commercial loan portfolio | Commercial | Interest rate
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	29	726
Owner-occupied | Commercial loan portfolio | Commercial | Forbearance agreement
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	1,360	482
Non-owner occupied | Commercial loan portfolio | Commercial
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment		$ 68
Total number of loans (in loan) | loan		1
Pre-modification recorded investment		$ 74
Non-owner occupied | Commercial loan portfolio | Commercial | Principal deferral
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment		68
Non-owner occupied | Commercial loan portfolio | Commercial | Principal reduction
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment		0
Non-owner occupied | Commercial loan portfolio | Commercial | Interest rate
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment		0
Non-owner occupied | Commercial loan portfolio | Commercial | Forbearance agreement
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment		$ 0
Vacant land | Commercial loan portfolio | Commercial
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	$ 22
Total number of loans (in loan) | loan	1
Pre-modification recorded investment	$ 24
Vacant land | Commercial loan portfolio | Commercial | Principal deferral
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	22
Vacant land | Commercial loan portfolio | Commercial | Principal reduction
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	0
Vacant land | Commercial loan portfolio | Commercial | Interest rate
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	0
Vacant land | Commercial loan portfolio | Commercial | Forbearance agreement
Financing Receivable, Modifications [Line Items]
Post-modification recorded investment	$ 0