Loans and Allowance for Loan Losses - Loans by risk category (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Loans outstanding by loan portfolio segment and risk category
Loans	$ 2,486,625	$ 2,443,994
Pass
Loans outstanding by loan portfolio segment and risk category
Loans		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		13,253
Commercial
Loans outstanding by loan portfolio segment and risk category
Loans	1,596,678	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	553,578	583,876
Commercial | Commercial and industrial | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	528,429	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	25,149	3,213
Commercial | Real estate construction
Loans outstanding by loan portfolio segment and risk category
Loans	108,776	97,810
Commercial | Real estate construction | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	108,336	97,548
Commercial | Real estate construction | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	440	262
Commercial | Commercial real estate
Loans outstanding by loan portfolio segment and risk category
Loans	934,324	881,670
Commercial | Commercial real estate | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	926,296	873,270
Commercial | Commercial real estate | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	8,028	8,400
Consumer
Loans outstanding by loan portfolio segment and risk category
Loans	889,947	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	698,002	679,551
Consumer | Residential | Real estate first mortgage | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	697,833	678,743
Consumer | Residential | Real estate first mortgage | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans	61	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	152,281	150,479
Consumer | Residential | Real estate junior lien | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	151,871	149,847
Consumer | Residential | Real estate junior lien | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	410	632
Consumer | Other revolving and installment
Loans outstanding by loan portfolio segment and risk category
Loans	39,664	50,608
Consumer | Other revolving and installment | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	39,663	50,607
Consumer | Other revolving and installment | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	$ 1	$ 1