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
Jun. 30, 2026
Dec. 31, 2025
Financing Receivable, Allowance for Credit Losses [Line Items]    
Allowance for loan loss Individually evaluated $ 36,058 $ 28,760
Allowance for loan loss Collectively evaluated 76,375 76,776
Total ACL on loans 112,433 105,536
Portfolio loans Individually evaluated 283,104 255,606
Portfolio loans collectively evaluated 8,063,827 7,902,670
Total portfolio loans 8,346,931 8,158,276
Commercial & Industrial [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Allowance for loan loss Individually evaluated 10,910 8,267
Allowance for loan loss Collectively evaluated 8,769 9,429
Total ACL on loans 19,679 17,696
Portfolio loans Individually evaluated 37,228 25,023
Portfolio loans collectively evaluated 1,050,428 1,091,438
Total portfolio loans 1,087,656 1,116,461
Municipal [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Allowance for loan loss Individually evaluated 119 0
Allowance for loan loss Collectively evaluated 163 135
Total ACL on loans 282 135
Portfolio loans Individually evaluated 8,834 17
Portfolio loans collectively evaluated 410,236 342,484
Total portfolio loans 419,070 342,501
Construction & Development [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Allowance for loan loss Individually evaluated 2,124 1,961
Allowance for loan loss Collectively evaluated 15,691 15,039
Total ACL on loans 17,815 17,000
Portfolio loans Individually evaluated 30,034 20,083
Portfolio loans collectively evaluated 1,161,048 1,137,782
Total portfolio loans 1,191,082 1,157,865
Farm [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Allowance for loan loss Individually evaluated 0 217
Allowance for loan loss Collectively evaluated 2,370 2,360
Total ACL on loans 2,370 2,577
Portfolio loans Individually evaluated 3,308 7,414
Portfolio loans collectively evaluated 341,175 320,211
Total portfolio loans 344,483 327,625
Non-Owner Occupied CRE [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Allowance for loan loss Individually evaluated 2,287 3,328
Allowance for loan loss Collectively evaluated 11,149 11,233
Total ACL on loans 13,436 14,561
Portfolio loans Individually evaluated 40,056 36,008
Portfolio loans collectively evaluated 791,873 796,808
Total portfolio loans 831,929 832,816
Owner Occupied CRE [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Allowance for loan loss Individually evaluated 7,141 8,727
Allowance for loan loss Collectively evaluated 15,989 16,641
Total ACL on loans 23,130 25,368
Portfolio loans Individually evaluated 67,806 62,026
Portfolio loans collectively evaluated 1,076,287 1,058,582
Total portfolio loans 1,144,093 1,120,608
Residential [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Allowance for loan loss Individually evaluated 13,296 5,927
Allowance for loan loss Collectively evaluated 19,707 19,687
Total ACL on loans 33,003 25,614
Portfolio loans Individually evaluated 90,307 98,492
Portfolio loans collectively evaluated 2,231,693 2,187,338
Total portfolio loans 2,322,000 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 1,971 1,591
Total ACL on loans 1,977 1,598
Portfolio loans Individually evaluated 2,919 3,292
Portfolio loans collectively evaluated 773,514 729,059
Total portfolio loans 776,433 732,351
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 564 659
Total ACL on loans 567 662
Portfolio loans Individually evaluated 784 1,104
Portfolio loans collectively evaluated 147,615 145,339
Total portfolio loans 148,399 146,443
Agriculture [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Allowance for loan loss Individually evaluated 172 323
Allowance for loan loss Collectively evaluated 2 2
Total ACL on loans 174 325
Portfolio loans Individually evaluated 1,828 2,147
Portfolio loans collectively evaluated 79,958 93,629
Total portfolio loans $ 81,786 $ 95,776