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Loans - Summary of Loan Balances (Detail) - USD ($) $ in Thousands | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | --- | ---
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Financing receivable | $ 6,520,740 |  | $ 6,450,447 |  |  |
Total principal balance of loans owed, net of charge-offs | 6,565,576 |  | 6,496,210 |  |  |
Unamortized net deferred loan fees | (17,182) |  | (15,275) |  |  |
Discounts to principal balance of loans owed, net of charge-offs | (27,654) |  | (30,488) |  |  |
Allowance for credit losses | (117,329) | $ (108,407) | (105,680) | $ (97,944) | $ (96,049) | $ (85,376)
Commercial Real Estate |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Financing receivable | 4,343,924 |  | 4,359,083 |  |  |
Allowance for credit losses | (71,016) | (64,937) | (61,381) | (55,450) | (54,992) | (51,140)
Consumer |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Financing receivable | 1,252,225 |  | 1,240,743 |  |  |
Allowance for credit losses | (26,513) | (24,896) | (24,639) | (23,931) | (23,679) | (23,474)
Commercial and industrial |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Financing receivable | 576,247 |  | 569,921 |  |  |
Allowance for credit losses | (11,647) | (12,069) | (13,597) | (9,979) | (9,042) | (3,862)
Construction |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Financing receivable | 278,425 |  | 211,560 |  |  |
Allowance for credit losses | (7,031) | (5,655) | (5,142) | (7,522) | (7,437) | (5,667)
Agriculture production |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Financing receivable | 61,337 |  | 61,414 |  |  |
Allowance for credit losses | (1,105) | (833) | (906) | (1,046) | (883) | (1,215)
Leases |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Financing receivable | 8,582 |  | 7,726 |  |  |
Allowance for credit losses | (17) | (17) | (15) | (16) | (16) | (18)
CRE non-owner occupied | Commercial Real Estate |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Financing receivable | 2,143,146 |  | 2,149,725 |  |  |
Allowance for credit losses | (33,042) | (32,963) | (30,962) | (28,081) | (28,055) | (25,739)
CRE owner occupied | Commercial Real Estate |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Financing receivable | 972,361 |  | 984,807 |  |  |
Allowance for credit losses | (20,208) | (14,559) | (14,014) | (12,620) | (12,071) | (10,691)
Multifamily | Commercial Real Estate |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Financing receivable | 951,590 |  | 944,537 |  |  |
Allowance for credit losses | (14,075) | (13,873) | (13,132) | (11,795) | (11,987) | (12,395)
Farmland | Commercial Real Estate |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Financing receivable | 276,827 |  | 280,014 |  |  |
Allowance for credit losses | (3,691) | (3,542) | (3,273) | (2,954) | (2,879) | (2,315)
SFR 1-4 1st DT liens | Consumer |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Financing receivable | 829,346 |  | 790,349 |  |  |
SFR HELOCs and junior liens | Consumer |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Financing receivable | 363,600 |  | 393,666 |  |  |
Allowance for credit losses | (10,608) | (10,914) | (11,413) | (11,591) | (10,843) | (10,510)
Other | Consumer |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Financing receivable | 59,279 |  | 56,728 |  |  |
Allowance for credit losses | $ (2,771) | $ (2,062) | $ (1,958) | $ (2,029) | $ (2,167) | $ (2,241)

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