Loans - Allowance for Loan Losses (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($) loan	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) loan	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, allowance for credit loss, excluding accrued interest	$ 27,010	$ 26,300	$ 27,010	$ 26,300	$ 29,232
Financing receivable, allowance for credit loss, period increase (decrease)			(263)
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan Losses, Beginning balance	26,840	23,637	29,232
Charge-offs	(443)	(487)	(1,076)
Recoveries	350	110	539
Provision	263	3,040	(385)	5,812
Allowance for Loan Losses, Ending balance	$ 27,010	26,300	$ 27,010	26,300
Number of loans individually evaluated for impairment | loan	6		6
Number of loans with an allowance for credit loss on loans individually evaluated for impairment | loan	1		1
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Ending Loan Balance - Collectively Evaluated	$ 2,639,492	2,559,662	$ 2,639,492	2,559,662	2,592,327
Allowance for loan losses - Loans Collectively Evaluated	26,394	26,244	26,394	26,244	29,191
Ending Loan Balance - Individually Evaluated	4,590	2,253	4,590	2,253	2,703
Allowance for loan losses - Loans Individually Evaluated	616	56	616	56	41
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, allowance for credit loss, excluding accrued interest					(1,300)
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan Losses, Beginning balance			(1,300)
Cumulative Effect, Period of Adoption, Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, allowance for credit loss, excluding accrued interest					27,932
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan Losses, Beginning balance			27,932
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, allowance for credit loss, excluding accrued interest	2,443	10,639	2,443	10,639	11,562
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan Losses, Beginning balance	2,429	10,004	11,562
Charge-offs	(426)	(431)	(1,053)
Recoveries	350	107	539
Provision	90	959	778
Allowance for Loan Losses, Ending balance	2,443	10,639	2,443	10,639
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Ending Loan Balance - Collectively Evaluated	892,549	828,377	892,549	828,377	859,657
Allowance for loan losses - Loans Collectively Evaluated	2,443	10,639	2,443	10,639	11,562
Ending Loan Balance - Individually Evaluated	0	116	0	116	111
Allowance for loan losses - Loans Individually Evaluated	0	0	0	0	0
Consumer | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, allowance for credit loss, excluding accrued interest					(9,383)
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan Losses, Beginning balance			(9,383)
Consumer | Cumulative Effect, Period of Adoption, Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, allowance for credit loss, excluding accrued interest					2,179
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan Losses, Beginning balance			2,179
Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, allowance for credit loss, excluding accrued interest	8,720	5,383	8,720	5,383	5,507
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan Losses, Beginning balance	8,170	4,929	5,507
Charge-offs	0	(50)	(3)
Recoveries	0	0	0
Provision	550	504	(719)
Allowance for Loan Losses, Ending balance	8,720	5,383	8,720	5,383
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Ending Loan Balance - Collectively Evaluated	909,824	922,767	909,824	922,767	921,504
Allowance for loan losses - Loans Collectively Evaluated	8,720	5,346	8,720	5,346	5,485
Ending Loan Balance - Individually Evaluated	677	952	677	952	1,417
Allowance for loan losses - Loans Individually Evaluated	0	37	0	37	22
Residential | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, allowance for credit loss, excluding accrued interest					3,935
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan Losses, Beginning balance			3,935
Residential | Cumulative Effect, Period of Adoption, Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, allowance for credit loss, excluding accrued interest					9,442
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan Losses, Beginning balance			9,442
Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, allowance for credit loss, excluding accrued interest	2,241	1,917	2,241	1,917	2,173
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan Losses, Beginning balance	4,297	1,639	2,173
Charge-offs	(17)	(6)	(20)
Recoveries	0	3	0
Provision	(2,039)	281	(1,996)
Allowance for Loan Losses, Ending balance	2,241	1,917	2,241	1,917
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Ending Loan Balance - Collectively Evaluated	242,790	276,620	242,790	276,620	240,507
Allowance for loan losses - Loans Collectively Evaluated	2,241	1,898	2,241	1,898	2,154
Ending Loan Balance - Individually Evaluated	0	51	0	51	47
Allowance for loan losses - Loans Individually Evaluated	0	19	0	19	19
Commercial | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, allowance for credit loss, excluding accrued interest					2,084
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan Losses, Beginning balance			2,084
Commercial | Cumulative Effect, Period of Adoption, Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, allowance for credit loss, excluding accrued interest					4,257
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan Losses, Beginning balance			4,257
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, allowance for credit loss, excluding accrued interest	13,606	8,361	13,606	8,361	9,990
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan Losses, Beginning balance	11,944	7,065	9,990
Charge-offs	0	0	0
Recoveries	0	0	0
Provision	1,662	1,296	1,552
Allowance for Loan Losses, Ending balance	13,606	8,361	13,606	8,361
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Ending Loan Balance - Collectively Evaluated	594,329	531,898	594,329	531,898	570,659
Allowance for loan losses - Loans Collectively Evaluated	12,990	8,361	12,990	8,361	9,990
Ending Loan Balance - Individually Evaluated	3,913	1,134	3,913	1,134	1,128
Allowance for loan losses - Loans Individually Evaluated	$ 616	$ 0	616	$ 0	0
Commercial Real Estate | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, allowance for credit loss, excluding accrued interest					2,064
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan Losses, Beginning balance			2,064
Commercial Real Estate | Cumulative Effect, Period of Adoption, Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, allowance for credit loss, excluding accrued interest					$ 12,054
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan Losses, Beginning balance			$ 12,054