v3.26.1
Loans Held-for-Investment and Allowance for Credit Losses - Schedule of Loans that are Individually Evaluated for Credit Losses (Detail) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Financing Receivable, Impaired [Line Items]    
Total Loans Individually Evaluated for Credit Losses $ 289,759 $ 255,606
Total Allowance for Credit Losses on Loans Individually Evaluated for Credit Losses 31,168 28,760
Collateral Pledged [Member]    
Financing Receivable, Impaired [Line Items]    
Collateral Dependent Loans Individually Evaluated for Credit Losses Without an Allowance 22,619 24,251
Collateral Dependent Loans Individually Evaluated for Credit Losses With an Allowance 29,510 30,870
Related Allowance on Collateral Dependent Loans 7,647 8,129
Uncollateralized [Member]    
Financing Receivable, Impaired [Line Items]    
Non-Collateral Dependent Loans Individually Evaluated for Credit Losses 237,630 200,485
Related Allowance on Non-Collateral Dependent Loans 23,521 20,631
Commercial [Member] | Commercial & Industrial [Member]    
Financing Receivable, Impaired [Line Items]    
Total Loans Individually Evaluated for Credit Losses 35,435 25,023
Total Allowance for Credit Losses on Loans Individually Evaluated for Credit Losses 11,340 8,267
Commercial [Member] | Commercial & Industrial [Member] | Collateral Pledged [Member]    
Financing Receivable, Impaired [Line Items]    
Collateral Dependent Loans Individually Evaluated for Credit Losses Without an Allowance 89 110
Collateral Dependent Loans Individually Evaluated for Credit Losses With an Allowance 2,556 3,529
Related Allowance on Collateral Dependent Loans 876 1,014
Commercial [Member] | Commercial & Industrial [Member] | Uncollateralized [Member]    
Financing Receivable, Impaired [Line Items]    
Non-Collateral Dependent Loans Individually Evaluated for Credit Losses 32,790 21,384
Related Allowance on Non-Collateral Dependent Loans 10,464 7,253
Commercial [Member] | Municipal [Member]    
Financing Receivable, Impaired [Line Items]    
Total Loans Individually Evaluated for Credit Losses 8,980 17
Total Allowance for Credit Losses on Loans Individually Evaluated for Credit Losses 130 0
Commercial [Member] | Municipal [Member] | Collateral Pledged [Member]    
Financing Receivable, Impaired [Line Items]    
Collateral Dependent Loans Individually Evaluated for Credit Losses Without an Allowance 0 0
Collateral Dependent Loans Individually Evaluated for Credit Losses With an Allowance 0 17
Related Allowance on Collateral Dependent Loans 0 0
Commercial [Member] | Municipal [Member] | Uncollateralized [Member]    
Financing Receivable, Impaired [Line Items]    
Non-Collateral Dependent Loans Individually Evaluated for Credit Losses 8,980 0
Related Allowance on Non-Collateral Dependent Loans 130 0
Agriculture [Member]    
Financing Receivable, Impaired [Line Items]    
Total Loans Individually Evaluated for Credit Losses 1,787 2,147
Total Allowance for Credit Losses on Loans Individually Evaluated for Credit Losses 337 323
Agriculture [Member] | Collateral Pledged [Member]    
Financing Receivable, Impaired [Line Items]    
Collateral Dependent Loans Individually Evaluated for Credit Losses Without an Allowance 0 274
Collateral Dependent Loans Individually Evaluated for Credit Losses With an Allowance 1,392 1,348
Related Allowance on Collateral Dependent Loans 223 198
Agriculture [Member] | Uncollateralized [Member]    
Financing Receivable, Impaired [Line Items]    
Non-Collateral Dependent Loans Individually Evaluated for Credit Losses 395 525
Related Allowance on Non-Collateral Dependent Loans 114 125
Real Estate [Member] | Construction & Development [Member]    
Financing Receivable, Impaired [Line Items]    
Total Loans Individually Evaluated for Credit Losses 23,998 20,083
Total Allowance for Credit Losses on Loans Individually Evaluated for Credit Losses 2,635 1,961
Real Estate [Member] | Construction & Development [Member] | Collateral Pledged [Member]    
Financing Receivable, Impaired [Line Items]    
Collateral Dependent Loans Individually Evaluated for Credit Losses Without an Allowance 0 0
Collateral Dependent Loans Individually Evaluated for Credit Losses With an Allowance 1,150 2,644
Related Allowance on Collateral Dependent Loans 126 171
Real Estate [Member] | Construction & Development [Member] | Uncollateralized [Member]    
Financing Receivable, Impaired [Line Items]    
Non-Collateral Dependent Loans Individually Evaluated for Credit Losses 22,848 17,439
Related Allowance on Non-Collateral Dependent Loans 2,509 1,790
Real Estate [Member] | Farm [Member]    
Financing Receivable, Impaired [Line Items]    
Total Loans Individually Evaluated for Credit Losses 6,905 7,414
Total Allowance for Credit Losses on Loans Individually Evaluated for Credit Losses 176 217
Real Estate [Member] | Farm [Member] | Collateral Pledged [Member]    
Financing Receivable, Impaired [Line Items]    
Collateral Dependent Loans Individually Evaluated for Credit Losses Without an Allowance 1,741 1,858
Collateral Dependent Loans Individually Evaluated for Credit Losses With an Allowance 203 208
Related Allowance on Collateral Dependent Loans 5 6
Real Estate [Member] | Farm [Member] | Uncollateralized [Member]    
Financing Receivable, Impaired [Line Items]    
Non-Collateral Dependent Loans Individually Evaluated for Credit Losses 4,961 5,348
Related Allowance on Non-Collateral Dependent Loans 171 211
Real Estate [Member] | Non-Owner Occupied CRE [Member]    
Financing Receivable, Impaired [Line Items]    
Total Loans Individually Evaluated for Credit Losses 39,498 36,008
Total Allowance for Credit Losses on Loans Individually Evaluated for Credit Losses 2,819 3,328
Real Estate [Member] | Non-Owner Occupied CRE [Member] | Collateral Pledged [Member]    
Financing Receivable, Impaired [Line Items]    
Collateral Dependent Loans Individually Evaluated for Credit Losses Without an Allowance 1,649 1,243
Collateral Dependent Loans Individually Evaluated for Credit Losses With an Allowance 1,568 1,631
Related Allowance on Collateral Dependent Loans 380 431
Real Estate [Member] | Non-Owner Occupied CRE [Member] | Uncollateralized [Member]    
Financing Receivable, Impaired [Line Items]    
Non-Collateral Dependent Loans Individually Evaluated for Credit Losses 36,281 33,134
Related Allowance on Non-Collateral Dependent Loans 2,439 2,897
Real Estate [Member] | Owner Occupied CRE [Member]    
Financing Receivable, Impaired [Line Items]    
Total Loans Individually Evaluated for Credit Losses 66,380 62,026
Total Allowance for Credit Losses on Loans Individually Evaluated for Credit Losses 7,852 8,727
Real Estate [Member] | Owner Occupied CRE [Member] | Collateral Pledged [Member]    
Financing Receivable, Impaired [Line Items]    
Collateral Dependent Loans Individually Evaluated for Credit Losses Without an Allowance 14,872 15,939
Collateral Dependent Loans Individually Evaluated for Credit Losses With an Allowance 9,773 10,667
Related Allowance on Collateral Dependent Loans 4,618 5,348
Real Estate [Member] | Owner Occupied CRE [Member] | Uncollateralized [Member]    
Financing Receivable, Impaired [Line Items]    
Non-Collateral Dependent Loans Individually Evaluated for Credit Losses 41,735 35,420
Related Allowance on Non-Collateral Dependent Loans 3,234 3,379
Real Estate [Member] | Residential [Member]    
Financing Receivable, Impaired [Line Items]    
Total Loans Individually Evaluated for Credit Losses 103,006 98,492
Total Allowance for Credit Losses on Loans Individually Evaluated for Credit Losses 5,870 5,927
Real Estate [Member] | Residential [Member] | Collateral Pledged [Member]    
Financing Receivable, Impaired [Line Items]    
Collateral Dependent Loans Individually Evaluated for Credit Losses Without an Allowance 4,268 4,827
Collateral Dependent Loans Individually Evaluated for Credit Losses With an Allowance 12,004 9,731
Related Allowance on Collateral Dependent Loans 1,417 958
Real Estate [Member] | Residential [Member] | Uncollateralized [Member]    
Financing Receivable, Impaired [Line Items]    
Non-Collateral Dependent Loans Individually Evaluated for Credit Losses 86,734 83,934
Related Allowance on Non-Collateral Dependent Loans 4,453 4,969
Consumer [Member] | Auto [Member]    
Financing Receivable, Impaired [Line Items]    
Total Loans Individually Evaluated for Credit Losses 2,837 3,292
Total Allowance for Credit Losses on Loans Individually Evaluated for Credit Losses 6 7
Consumer [Member] | Auto [Member] | Collateral Pledged [Member]    
Financing Receivable, Impaired [Line Items]    
Collateral Dependent Loans Individually Evaluated for Credit Losses Without an Allowance 0 0
Collateral Dependent Loans Individually Evaluated for Credit Losses With an Allowance 662 871
Related Allowance on Collateral Dependent Loans 1 2
Consumer [Member] | Auto [Member] | Uncollateralized [Member]    
Financing Receivable, Impaired [Line Items]    
Non-Collateral Dependent Loans Individually Evaluated for Credit Losses 2,175 2,421
Related Allowance on Non-Collateral Dependent Loans 5 5
Consumer [Member] | Non-Auto [Member]    
Financing Receivable, Impaired [Line Items]    
Total Loans Individually Evaluated for Credit Losses 933 1,104
Total Allowance for Credit Losses on Loans Individually Evaluated for Credit Losses 3 3
Consumer [Member] | Non-Auto [Member] | Collateral Pledged [Member]    
Financing Receivable, Impaired [Line Items]    
Collateral Dependent Loans Individually Evaluated for Credit Losses Without an Allowance 0 0
Collateral Dependent Loans Individually Evaluated for Credit Losses With an Allowance 202 224
Related Allowance on Collateral Dependent Loans 1 1
Consumer [Member] | Non-Auto [Member] | Uncollateralized [Member]    
Financing Receivable, Impaired [Line Items]    
Non-Collateral Dependent Loans Individually Evaluated for Credit Losses 731 880
Related Allowance on Non-Collateral Dependent Loans $ 2 $ 2