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Loans - Summary of Loan Balances (Detail) - USD ($) $ in Thousands | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | --- | --- | ---
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total | $ 6,113,421 |  | $ 4,916,624 |  |  |
Total principal balance of loans owed, net of charge-offs | 6,160,388 |  | 4,946,653 |  |  |
Unamortized net deferred loan fees | (13,867) |  | (13,922) |  |  |
Discounts to principal balance of loans owed, net of charge-offs | (33,100) |  | (16,107) |  |  |
Allowance for credit losses | (97,944) | $ (96,049) | (85,376) | $ (86,062) | $ (85,941) | $ (91,847)
Commercial real estate |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total | 4,049,893 |  | 3,306,054 |  |  |
Allowance for credit losses | (55,450) | (54,992) | (51,140) | (51,637) | (50,403) | (53,693)
Consumer |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total | 1,162,989 |  | 1,071,551 |  |  |
Allowance for credit losses | (23,931) | (23,679) | (23,474) | (23,950) | (24,604) | (25,148)
Commercial and industrial |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total | 507,685 |  | 259,355 |  |  |
Allowance for credit losses | (9,979) | (9,042) | (3,862) | (4,511) | (4,464) | (4,252)
Construction |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total | 313,646 |  | 222,281 |  |  |
Allowance for credit losses | (7,522) | (7,437) | (5,667) | (4,951) | (5,476) | (7,540)
Agriculture production |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total | 71,373 |  | 50,811 |  |  |
Allowance for credit losses | (1,046) | (883) | (1,215) | (1,007) | (988) | (1,209)
Leases |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total | 7,835 |  | 6,572 |  |  |
Allowance for credit losses | (16) | (16) | (18) | (6) | (6) | (5)
CRE non-owner occupied | Commercial real estate |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total | 1,993,848 |  | 1,603,141 |  |  |
Allowance for credit losses | (28,081) | (28,055) | (25,739) | (26,028) | (26,434) | (29,380)
CRE owner occupied | Commercial real estate |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total | 933,589 |  | 706,307 |  |  |
Allowance for credit losses | (12,620) | (12,071) | (10,691) | (10,463) | (9,874) | (10,861)
Multifamily | Commercial real estate |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total | 869,970 |  | 823,500 |  |  |
Allowance for credit losses | (11,795) | (11,987) | (12,395) | (13,196) | (12,371) | (11,472)
Farmland | Commercial real estate |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total | 252,486 |  | 173,106 |  |  |
Allowance for credit losses | (2,954) | (2,879) | (2,315) | (1,950) | (1,724) | (1,980)
SFR 1-4 1st DT liens | Consumer |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total | 718,690 |  | 666,960 |  |  |
SFR HELOCs and junior liens | Consumer |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total | 384,813 |  | 337,513 |  |  |
Allowance for credit losses | (11,591) | (10,843) | (10,510) | (10,701) | (11,079) | (11,771)
Other | Consumer |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total | 59,486 |  | 67,078 |  |  |
Allowance for credit losses | $ (2,029) | $ (2,167) | $ (2,241) | $ (2,620) | $ (2,860) | $ (3,260)

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