Loans and Allowance for Credit Losses - Loans by risk category (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Loans outstanding by loan portfolio segment and risk category
Loans	$ 2,533,522	$ 2,443,994
Pass
Loans outstanding by loan portfolio segment and risk category
Loans	2,493,524	2,408,709
Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans		22,032
Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	39,998	13,253
Commercial
Loans outstanding by loan portfolio segment and risk category
Loans	1,634,109	1,563,356
Commercial | Pass
Loans outstanding by loan portfolio segment and risk category
Loans		1,529,512
Commercial | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans		21,969
Commercial | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans		11,875
Commercial | Commercial and industrial
Loans outstanding by loan portfolio segment and risk category
Loans	551,860	583,876
Commercial | Commercial and industrial | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	519,134	558,694
Commercial | Commercial and industrial | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans		21,969
Commercial | Commercial and industrial | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	32,726	3,213
Commercial | Real estate construction
Loans outstanding by loan portfolio segment and risk category
Loans	78,428	97,810
Commercial | Real estate construction | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	78,428	97,548
Commercial | Real estate construction | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans		262
Commercial | Commercial real estate
Loans outstanding by loan portfolio segment and risk category
Loans	1,003,821	881,670
Commercial | Commercial real estate | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	997,014	873,270
Commercial | Commercial real estate | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	6,807	8,400
Consumer
Loans outstanding by loan portfolio segment and risk category
Loans	899,413	880,638
Consumer | Pass
Loans outstanding by loan portfolio segment and risk category
Loans		879,197
Consumer | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans		63
Consumer | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans		1,378
Consumer | Residential | Real estate first mortgage
Loans outstanding by loan portfolio segment and risk category
Loans	707,630	679,551
Consumer | Residential | Real estate first mortgage | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	707,522	678,743
Consumer | Residential | Real estate first mortgage | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans		63
Consumer | Residential | Real estate first mortgage | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	108	745
Consumer | Residential | Real estate junior lien
Loans outstanding by loan portfolio segment and risk category
Loans	157,231	150,479
Consumer | Residential | Real estate junior lien | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	156,874	149,847
Consumer | Residential | Real estate junior lien | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	357	632
Consumer | Other revolving and installment
Loans outstanding by loan portfolio segment and risk category
Loans	34,552	50,608
Consumer | Other revolving and installment | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	$ 34,552	50,607
Consumer | Other revolving and installment | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans		$ 1