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Business Combination and Asset Purchase - Summary of Carrying Amount of Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Apr. 30, 2021
Business Acquisition [Line Items]
Carrying amount, net of fair value adjustment	$ 225	$ 1,309
Consumer Real Estate [Member]
Business Acquisition [Line Items]
Carrying amount, net of fair value adjustment	23	24
Agricultural Real Estate [Member]
Business Acquisition [Line Items]
Carrying amount, net of fair value adjustment		981
Commercial Real Estate [Member]
Business Acquisition [Line Items]
Carrying amount, net of fair value adjustment	234	315
Commercial and Industrial [Member]
Business Acquisition [Line Items]
Carrying amount, net of fair value adjustment	$ 293	$ 314

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The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and other-than-temporary impairments), for loans accounted for as debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 15
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123409700&loc=d3e13503-111538

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544

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