Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Loans and Leases Receivable Disclosure [Line Items]
Total	$ 6,820,774	$ 6,768,523
Total principal balance of loans owed, net of charge-offs	6,854,102	6,804,113
Unamortized net deferred loan fees	(15,013)	(15,283)
Discounts to principal balance of loans owed, net of charge-offs	(18,315)	(20,307)
Allowance for credit losses on loans	(128,423)	(125,366)	$ (124,394)	$ (121,522)
Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Total	4,634,446	4,577,632
Allowance for credit losses on loans	(72,180)	(72,849)	(72,175)	(68,864)
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total	1,279,878	1,281,059
Allowance for credit losses on loans	(25,540)	(27,463)	(27,441)	(27,453)
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Total	457,189	471,271
Allowance for credit losses on loans	(17,561)	(14,397)	(11,867)	(12,750)
Construction
Loans and Leases Receivable Disclosure [Line Items]
Total	298,319	279,933
Allowance for credit losses on loans	(10,346)	(7,224)	(9,162)	(8,856)
Agriculture production
Loans and Leases Receivable Disclosure [Line Items]
Total	144,588	151,822
Allowance for credit losses on loans	(2,768)	(3,403)	(3,708)	(3,589)
Leases
Loans and Leases Receivable Disclosure [Line Items]
Total	6,354	6,806
Allowance for credit losses on loans	(28)	(30)	(41)	(10)
CRE non-owner occupied \| Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Total	2,359,104	2,323,036
Allowance for credit losses on loans	(39,670)	(37,229)	(36,687)	(35,077)
CRE owner occupied \| Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Total	986,721	961,415
Allowance for credit losses on loans	(12,169)	(15,747)	(16,111)	(15,081)
Multifamily \| Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Total	1,026,566	1,028,035
Allowance for credit losses on loans	(15,604)	(15,913)	(15,682)	(14,418)
Farmland \| Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Total	262,055	265,146
Allowance for credit losses on loans	(4,737)	(3,960)	(3,695)	(4,288)
SFR 1-4 1st DT liens \| Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total	852,719	859,660
Allowance for credit losses on loans	(10,995)	(14,227)	(14,140)	(14,009)
SFR HELOCs and junior liens \| Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total	373,970	363,420
Allowance for credit losses on loans	(11,650)	(10,411)	(9,942)	(10,273)
Other \| Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total	53,189	57,979
Allowance for credit losses on loans	$ (2,895)	$ (2,825)	$ (3,359)	$ (3,171)

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

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+ References

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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