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Loans - Summary of Loan Balances (Detail) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023 | Dec. 31, 2022
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Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Total | $ 6,800,695 | $ 6,794,470 |  |
Total principal balance of loans owed, net of charge-offs | 6,839,589 | 6,834,935 |  |
Unamortized net deferred loan fees | (15,588) | (15,826) |  |
Discounts to principal balance of loans owed, net of charge-offs | (23,306) | (24,639) |  |
Allowance for credit losses | (124,394) | (121,522) | $ (108,407) | $ (105,680)
Commercial real estate |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Total | 4,443,768 | 4,394,802 |  |
Allowance for credit losses | (72,175) | (68,864) | (64,937) | (61,381)
Consumer |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Total | 1,303,757 | 1,313,268 |  |
Allowance for credit losses | (27,441) | (27,453) | (24,896) | (24,639)
Commercial and industrial |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Total | 549,780 | 586,455 |  |
Allowance for credit losses | (11,867) | (12,750) | (12,069) | (13,597)
Construction |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Total | 348,981 | 347,198 |  |
Allowance for credit losses | (9,162) | (8,856) | (5,655) | (5,142)
Agriculture production |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Total | 145,159 | 144,497 |  |
Allowance for credit losses | (3,708) | (3,589) | (833) | (906)
Leases |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Total | 9,250 | 8,250 |  |
Allowance for credit losses | (41) | (10) | (17) | (15)
CRE non-owner occupied | Commercial real estate |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Total | 2,220,568 | 2,217,806 |  |
Allowance for credit losses | (36,687) | (35,077) | (32,963) | (30,962)
CRE owner occupied | Commercial real estate |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Total | 974,968 | 956,440 |  |
Allowance for credit losses | (16,111) | (15,081) | (14,559) | (14,014)
Multifamily | Commercial real estate |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Total | 982,290 | 949,502 |  |
Allowance for credit losses | (15,682) | (14,418) | (13,873) | (13,132)
Farmland | Commercial real estate |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Total | 265,942 | 271,054 |  |
Allowance for credit losses | (3,695) | (4,288) | (3,542) | (3,273)
SFR 1-4 1st DT liens | Consumer |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Total | 883,520 | 883,438 |  |
Allowance for credit losses | (14,140) | (14,009) | (11,920) | (11,268)
SFR HELOCs and junior liens | Consumer |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Total | 345,223 | 356,813 |  |
Allowance for credit losses | (9,942) | (10,273) | (10,914) | (11,413)
Other | Consumer |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Total | 75,014 | 73,017 |  |
Allowance for credit losses | $ (3,359) | $ (3,171) | $ (2,062) | $ (1,958)

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