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Fair Value Information - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail) - Fair Value on Non-Recurring Basis [Member] - Loans, Excluding PCI Loans [Member] - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Description of assets
Total assets	$ 2,300	$ 5,722
Asset Held-for-Sale [Member]
Description of assets
Total assets		0
Commercial Real Estate [Member]
Description of assets
Total assets	2,258	2,128
Construction [Member]
Description of assets
Total assets	0	0
SBA
Description of assets
Total assets	26	57
SBA - PPP [Member]
Description of assets
Total assets	0	0
Commercial and Industrial [Member]
Description of assets
Total assets	16	3,510
Dairy & Livestock and Agribusiness [Member]
Description of assets
Total assets	0	27
Municipal Lease Finance Receivables [Member]
Description of assets
Total assets	0	0
SFR Mortgage [Member]
Description of assets
Total assets	0	0
Consumer and Other Loans [Member]
Description of assets
Total assets	0	0
Other Real Estate Owned [Member]
Description of assets
Total assets	0	0
Level 1 [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | Asset Held-for-Sale [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | Commercial Real Estate [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | Construction [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | SBA
Description of assets
Total assets	0	0
Level 1 [Member] | SBA - PPP [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | Commercial and Industrial [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | Dairy & Livestock and Agribusiness [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | Municipal Lease Finance Receivables [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | SFR Mortgage [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | Consumer and Other Loans [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | Other Real Estate Owned [Member]
Description of assets
Total assets	0	0
Level 2 [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | Asset Held-for-Sale [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | Commercial Real Estate [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | Construction [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | SBA
Description of assets
Total assets	0	0
Level 2 [Member] | SBA - PPP [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | Commercial and Industrial [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | Dairy & Livestock and Agribusiness [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | Municipal Lease Finance Receivables [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | SFR Mortgage [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | Consumer and Other Loans [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | Other Real Estate Owned [Member]
Description of assets
Total assets	0	0
Level 3 [Member]
Description of assets
Total assets	24,731	30,465
Level 3 [Member] | Asset Held-for-Sale [Member]
Description of assets
Total assets	0	0
Level 3 [Member] | Commercial Real Estate [Member]
Description of assets
Total assets	13,813	18,678
Level 3 [Member] | Construction [Member]
Description of assets
Total assets	0	0
Level 3 [Member] | SBA
Description of assets
Total assets	211	995
Level 3 [Member] | SBA - PPP [Member]
Description of assets
Total assets	0	0
Level 3 [Member] | Commercial and Industrial [Member]
Description of assets
Total assets	4,612	6,092
Level 3 [Member] | Dairy & Livestock and Agribusiness [Member]
Description of assets
Total assets	5,787	4,700
Level 3 [Member] | Municipal Lease Finance Receivables [Member]
Description of assets
Total assets	0	0
Level 3 [Member] | SFR Mortgage [Member]
Description of assets
Total assets	308	0
Level 3 [Member] | Consumer and Other Loans [Member]
Description of assets
Total assets	0	0
Level 3 [Member] | Other Real Estate Owned [Member]
Description of assets
Total assets	0	0
Carrying Value [Member]
Description of assets
Total assets	24,731	30,465
Carrying Value [Member] | Asset Held-for-Sale [Member]
Description of assets
Total assets	0	0
Carrying Value [Member] | Commercial Real Estate [Member]
Description of assets
Total assets	13,813	18,678
Carrying Value [Member] | Construction [Member]
Description of assets
Total assets	0	0
Carrying Value [Member] | SBA
Description of assets
Total assets	211	995
Carrying Value [Member] | SBA - PPP [Member]
Description of assets
Total assets	0	0
Carrying Value [Member] | Commercial and Industrial [Member]
Description of assets
Total assets	4,612	6,092
Carrying Value [Member] | Dairy & Livestock and Agribusiness [Member]
Description of assets
Total assets	5,787	4,700
Carrying Value [Member] | Municipal Lease Finance Receivables [Member]
Description of assets
Total assets	0	0
Carrying Value [Member] | SFR Mortgage [Member]
Description of assets
Total assets	308	0
Carrying Value [Member] | Consumer and Other Loans [Member]
Description of assets
Total assets	0	0
Carrying Value [Member] | Other Real Estate Owned [Member]
Description of assets
Total assets		$ 0

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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