Loans, Allowance for Credit Losses - Loans, and Credit Quality - Schedule of Nonaccrual Loans by Portfolio Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	$ 71,545	$ 31,679
Percent of total loans	0.70%	0.50%
% of Total	100.00%	100.00%
Retail & other
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	$ 192	$ 121
% of Total	0.00%	0.00%
Commercial \| Commercial & industrial
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	$ 18,409	$ 10,314
% of Total	26.00%	32.00%
Commercial \| Owner-occupied CRE
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	$ 21,661	$ 6,938
% of Total	30.00%	22.00%
Commercial \| Agricultural
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	$ 9,661	$ 10,476
% of Total	14.00%	33.00%
Commercial real estate \| CRE investment
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	$ 9,446	$ 497
% of Total	13.00%	2.00%
Commercial real estate \| Construction & land development
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	$ 100	$ 0
% of Total	0.00%	0.00%
Residential \| Residential first mortgage
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	$ 10,214	$ 3,022
% of Total	14.00%	10.00%
Residential \| Residential junior mortgage
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	$ 1,862	$ 311
% of Total	3.00%	1.00%
Residential \| Residential construction
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	$ 0	$ 0
% of Total	0.00%	0.00%