v3.26.1
Loans Held-for-Investment and Allowance for Credit Losses - Schedule of Allowance for Loan Losses by Portfolio Segment (Detail) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Financing Receivable, Allowance for Credit Losses [Line Items]    
Allowance for loan loss Individually evaluated $ 31,168 $ 28,760
Allowance for loan loss Collectively evaluated 76,750 76,776
Total ACL on loans 107,918 105,536
Portfolio loans Individually evaluated 289,759 255,606
Portfolio loans collectively evaluated 7,995,361 7,902,670
Total portfolio loans 8,285,120 8,158,276
Commercial & Industrial [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Allowance for loan loss Individually evaluated 11,340 8,267
Allowance for loan loss Collectively evaluated 9,375 9,429
Total ACL on loans 20,715 17,696
Portfolio loans Individually evaluated 35,435 25,023
Portfolio loans collectively evaluated 1,114,496 1,091,438
Total portfolio loans 1,149,931 1,116,461
Municipal [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Allowance for loan loss Individually evaluated 130 0
Allowance for loan loss Collectively evaluated 122 135
Total ACL on loans 252 135
Portfolio loans Individually evaluated 8,980 17
Portfolio loans collectively evaluated 375,493 342,484
Total portfolio loans 384,473 342,501
Construction & Development [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Allowance for loan loss Individually evaluated 2,635 1,961
Allowance for loan loss Collectively evaluated 14,979 15,039
Total ACL on loans 17,614 17,000
Portfolio loans Individually evaluated 23,998 20,083
Portfolio loans collectively evaluated 1,145,039 1,137,782
Total portfolio loans 1,169,037 1,157,865
Farm [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Allowance for loan loss Individually evaluated 176 217
Allowance for loan loss Collectively evaluated 2,312 2,360
Total ACL on loans 2,488 2,577
Portfolio loans Individually evaluated 6,905 7,414
Portfolio loans collectively evaluated 322,246 320,211
Total portfolio loans 329,151 327,625
Non-Owner Occupied CRE [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Allowance for loan loss Individually evaluated 2,819 3,328
Allowance for loan loss Collectively evaluated 11,050 11,233
Total ACL on loans 13,869 14,561
Portfolio loans Individually evaluated 39,498 36,008
Portfolio loans collectively evaluated 786,273 796,808
Total portfolio loans 825,771 832,816
Owner Occupied CRE [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Allowance for loan loss Individually evaluated 7,852 8,727
Allowance for loan loss Collectively evaluated 16,484 16,641
Total ACL on loans 24,336 25,368
Portfolio loans Individually evaluated 66,380 62,026
Portfolio loans collectively evaluated 1,065,734 1,058,582
Total portfolio loans 1,132,114 1,120,608
Residential [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Allowance for loan loss Individually evaluated 5,870 5,927
Allowance for loan loss Collectively evaluated 20,074 19,687
Total ACL on loans 25,944 25,614
Portfolio loans Individually evaluated 103,006 98,492
Portfolio loans collectively evaluated 2,219,091 2,187,338
Total portfolio loans 2,322,097 2,285,830
Auto [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Allowance for loan loss Individually evaluated 6 7
Allowance for loan loss Collectively evaluated 1,850 1,591
Total ACL on loans 1,856 1,598
Portfolio loans Individually evaluated 2,837 3,292
Portfolio loans collectively evaluated 748,446 729,059
Total portfolio loans 751,283 732,351
Non-Auto [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Allowance for loan loss Individually evaluated 3 3
Allowance for loan loss Collectively evaluated 502 659
Total ACL on loans 505 662
Portfolio loans Individually evaluated 933 1,104
Portfolio loans collectively evaluated 142,747 145,339
Total portfolio loans 143,680 146,443
Agriculture [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Allowance for loan loss Individually evaluated 337 323
Allowance for loan loss Collectively evaluated 2 2
Total ACL on loans 339 325
Portfolio loans Individually evaluated 1,787 2,147
Portfolio loans collectively evaluated 75,796 93,629
Total portfolio loans $ 77,583 $ 95,776