Loans and Allowance for Loan Losses - Loans by risk category (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Loans outstanding by loan portfolio segment and risk category
Loans	$ 1,758,020	$ 1,979,375
Pass
Loans outstanding by loan portfolio segment and risk category
Loans	1,736,781	1,922,704
Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans	480	15,326
Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	20,759	41,345
Commercial
Loans outstanding by loan portfolio segment and risk category
Loans	1,076,273	1,299,316
Commercial | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	1,056,145	1,247,786
Commercial | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans	480	12,101
Commercial | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	19,648	39,429
Commercial | Commercial and industrial
Loans outstanding by loan portfolio segment and risk category
Loans	436,761	691,858
Commercial | Commercial and industrial | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	430,235	669,602
Commercial | Commercial and industrial | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans	480	5,415
Commercial | Commercial and industrial | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	6,046	16,841
Commercial | Real estate construction
Loans outstanding by loan portfolio segment and risk category
Loans	40,619	44,451
Commercial | Real estate construction | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	40,619	44,451
Commercial | Commercial real estate
Loans outstanding by loan portfolio segment and risk category
Loans	598,893	563,007
Commercial | Commercial real estate | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	585,291	533,733
Commercial | Commercial real estate | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans		6,686
Commercial | Commercial real estate | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	13,602	22,588
Consumer
Loans outstanding by loan portfolio segment and risk category
Loans	681,747	680,059
Consumer | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	680,636	674,918
Consumer | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans		3,225
Consumer | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	1,111	1,916
Consumer | Residential | Real estate first mortgage
Loans outstanding by loan portfolio segment and risk category
Loans	510,716	463,370
Consumer | Residential | Real estate first mortgage | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	510,375	461,221
Consumer | Residential | Real estate first mortgage | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans		1,406
Consumer | Residential | Real estate first mortgage | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	341	743
Consumer | Residential | Real estate junior lien
Loans outstanding by loan portfolio segment and risk category
Loans	125,668	143,416
Consumer | Residential | Real estate junior lien | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	124,898	140,461
Consumer | Residential | Real estate junior lien | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans		1,819
Consumer | Residential | Real estate junior lien | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	770	1,136
Consumer | Other revolving and installment
Loans outstanding by loan portfolio segment and risk category
Loans	45,363	73,273
Consumer | Other revolving and installment | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	$ 45,363	73,236
Consumer | Other revolving and installment | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans		$ 37