Loans and Allowance for Credit Losses - Past due aging analysis (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Past due aging analysis of loans
Loans	$ 2,915,792	$ 2,759,583
Nonaccrual	27,618	8,596
30-59 Days Past Due
Past due aging analysis of loans
Loans	3,264	2,789
60-89 Days Past Due
Past due aging analysis of loans
Loans	13,194	601
90 Days or More Past Due
Past due aging analysis of loans
Loans		139
Current
Past due aging analysis of loans
Loans	2,871,716	2,747,458
Commercial
Past due aging analysis of loans
Loans	2,008,662	1,849,267
Nonaccrual	26,711	7,710
Commercial | 30-59 Days Past Due
Past due aging analysis of loans
Loans	1,873	1,052
Commercial | 60-89 Days Past Due
Past due aging analysis of loans
Loans	5,929
Commercial | 90 Days or More Past Due
Past due aging analysis of loans
Loans		139
Commercial | Current
Past due aging analysis of loans
Loans	1,974,149	1,840,366
Commercial | Commercial and industrial
Past due aging analysis of loans
Loans	591,779	562,180
Nonaccrual	3,078	6,595
Commercial | Commercial and industrial | 30-59 Days Past Due
Past due aging analysis of loans
Loans	1,594	844
Commercial | Commercial and industrial | 60-89 Days Past Due
Past due aging analysis of loans
Loans	128
Commercial | Commercial and industrial | 90 Days or More Past Due
Past due aging analysis of loans
Loans		139
Commercial | Commercial and industrial | Current
Past due aging analysis of loans
Loans	586,979	554,602
Commercial | Commercial real estate
Past due aging analysis of loans
Loans	1,334,924	1,210,114
Nonaccrual	23,563	1,115
Commercial | Commercial real estate | 30-59 Days Past Due
Past due aging analysis of loans
Loans	279	128
Commercial | Commercial real estate | 60-89 Days Past Due
Past due aging analysis of loans
Loans	5,801
Commercial | Commercial real estate | Current
Past due aging analysis of loans
Loans	1,305,281	1,208,871
Commercial | Commercial real estate | Construction, land and development
Past due aging analysis of loans
Loans	161,751	124,034
Nonaccrual	21,475
Commercial | Commercial real estate | Construction, land and development | Current
Past due aging analysis of loans
Loans	140,276	124,034
Commercial | Commercial real estate | Multifamily
Past due aging analysis of loans
Loans	242,041	245,103
Commercial | Commercial real estate | Multifamily | Current
Past due aging analysis of loans
Loans	242,041	245,103
Commercial | Commercial real estate | Non-owner occupied
Past due aging analysis of loans
Loans	647,776	569,354
Commercial | Commercial real estate | Non-owner occupied | 30-59 Days Past Due
Past due aging analysis of loans
Loans		87
Commercial | Commercial real estate | Non-owner occupied | 60-89 Days Past Due
Past due aging analysis of loans
Loans	5,801
Commercial | Commercial real estate | Non-owner occupied | Current
Past due aging analysis of loans
Loans	641,975	569,267
Commercial | Commercial real estate | Owner occupied
Past due aging analysis of loans
Loans	283,356	271,623
Nonaccrual	2,088	1,115
Commercial | Commercial real estate | Owner occupied | 30-59 Days Past Due
Past due aging analysis of loans
Loans	279	41
Commercial | Commercial real estate | Owner occupied | Current
Past due aging analysis of loans
Loans	280,989	270,467
Agricultural | Commercial real estate
Past due aging analysis of loans
Loans	81,959	76,973
Nonaccrual	70
Agricultural | Commercial real estate | 30-59 Days Past Due
Past due aging analysis of loans
Loans		80
Agricultural | Commercial real estate | Current
Past due aging analysis of loans
Loans	81,889	76,893
Agricultural | Commercial real estate | Land
Past due aging analysis of loans
Loans	41,410	40,832
Agricultural | Commercial real estate | Land | Current
Past due aging analysis of loans
Loans	41,410	40,832
Agricultural | Commercial real estate | Production
Past due aging analysis of loans
Loans	40,549	36,141
Nonaccrual	70
Agricultural | Commercial real estate | Production | 30-59 Days Past Due
Past due aging analysis of loans
Loans		80
Agricultural | Commercial real estate | Production | Current
Past due aging analysis of loans
Loans	40,479	36,061
Consumer
Past due aging analysis of loans
Loans	907,130	910,316
Nonaccrual	907	886
Consumer | 30-59 Days Past Due
Past due aging analysis of loans
Loans	1,391	1,737
Consumer | 60-89 Days Past Due
Past due aging analysis of loans
Loans	7,265	601
Consumer | Current
Past due aging analysis of loans
Loans	897,567	907,092
Consumer | Commercial real estate
Past due aging analysis of loans
Loans	871,393	881,013
Nonaccrual	907	886
Consumer | Commercial real estate | 30-59 Days Past Due
Past due aging analysis of loans
Loans	1,259	1,567
Consumer | Commercial real estate | 60-89 Days Past Due
Past due aging analysis of loans
Loans	6,969	554
Consumer | Commercial real estate | Current
Past due aging analysis of loans
Loans	862,258	878,006
Consumer | Commercial real estate | First lien
Past due aging analysis of loans
Loans		697,900
Nonaccrual		638
Consumer | Commercial real estate | First lien | 30-59 Days Past Due
Past due aging analysis of loans
Loans		901
Consumer | Commercial real estate | First lien | 60-89 Days Past Due
Past due aging analysis of loans
Loans		554
Consumer | Commercial real estate | First lien | Current
Past due aging analysis of loans
Loans		695,807
Consumer | Commercial real estate | Construction
Past due aging analysis of loans
Loans	22,573	28,979
Consumer | Commercial real estate | Construction | 60-89 Days Past Due
Past due aging analysis of loans
Loans	4,680
Consumer | Commercial real estate | Construction | Current
Past due aging analysis of loans
Loans	17,893	28,979
Consumer | Commercial real estate | HELOC
Past due aging analysis of loans
Loans	126,211	118,315
Nonaccrual	163	178
Consumer | Commercial real estate | HELOC | 30-59 Days Past Due
Past due aging analysis of loans
Loans	274	597
Consumer | Commercial real estate | HELOC | 60-89 Days Past Due
Past due aging analysis of loans
Loans	1,382
Consumer | Commercial real estate | HELOC | Current
Past due aging analysis of loans
Loans	124,392	117,540
Consumer | Commercial real estate | Junior lien
Past due aging analysis of loans
Loans	36,323	35,819
Nonaccrual	120	70
Consumer | Commercial real estate | Junior lien | 30-59 Days Past Due
Past due aging analysis of loans
Loans	108	69
Consumer | Commercial real estate | Junior lien | 60-89 Days Past Due
Past due aging analysis of loans
Loans	447
Consumer | Commercial real estate | Junior lien | Current
Past due aging analysis of loans
Loans	35,648	35,680
Consumer | Residential
Past due aging analysis of loans
Loans	871,393	881,013
Nonaccrual	907	886
Consumer | Residential | First lien
Past due aging analysis of loans
Loans	686,286	697,900
Nonaccrual	624	638
Consumer | Residential | First lien | 30-59 Days Past Due
Past due aging analysis of loans
Loans	877
Consumer | Residential | First lien | 60-89 Days Past Due
Past due aging analysis of loans
Loans	460
Consumer | Residential | First lien | Current
Past due aging analysis of loans
Loans	684,325
Consumer | Residential | Construction
Past due aging analysis of loans
Loans	22,573	28,979
Consumer | Residential | HELOC
Past due aging analysis of loans
Loans	126,211	118,315
Nonaccrual	163	178
Consumer | Residential | Junior lien
Past due aging analysis of loans
Loans	36,323	35,819
Nonaccrual	120	70
Consumer | Other consumer | Other consumer
Past due aging analysis of loans
Loans	35,737	29,303
Consumer | Other consumer | Other consumer | 30-59 Days Past Due
Past due aging analysis of loans
Loans	132	170
Consumer | Other consumer | Other consumer | 60-89 Days Past Due
Past due aging analysis of loans
Loans	296	47
Consumer | Other consumer | Other consumer | Current
Past due aging analysis of loans
Loans	$ 35,309	$ 29,086