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Loans and Allowance for Loan and Lease Losses - Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Impaired loans with no related allowance recorded, carrying amount	$ 2,294	$ 2,525
Impaired loans with no related allowance recorded, unpaid principal balance	2,294	2,525
Impaired loans, related allowances	65	67
Impaired loans with an allowance recorded, carrying amount	72	73
Impaired loans with an allowance recorded, unpaid principal balance	72	73
Impaired loans, carrying amount	2,366	2,598
Impaired loans, unpaid principal balance	2,366	2,598
Impaired loans, average recorded investment	2,444	3,809
Impaired loans, interest income recognized	20	241
Impaired loans, interest income received	22	181
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Impaired loans with no related allowance recorded, carrying amount	621	630
Impaired loans with no related allowance recorded, unpaid principal balance	621	630
Impaired loans, related allowances	9	10
Impaired loans with an allowance recorded, carrying amount	16	16
Impaired loans with an allowance recorded, unpaid principal balance	16	16
Impaired loans, carrying amount	637	646
Impaired loans, unpaid principal balance	637	646
Impaired loans, average recorded investment	642	773
Impaired loans, interest income recognized	2	31
Impaired loans, interest income received	1	31
Real Estate [Member] | Secured By Non-farm Non residential Properties [Member]
Impaired loans with no related allowance recorded, carrying amount	1,039	1,051
Impaired loans with no related allowance recorded, unpaid principal balance	1,039	1,051
Impaired loans, carrying amount	1,039	1,051
Impaired loans, unpaid principal balance	1,039	1,051
Impaired loans, average recorded investment	1,043	2,377
Impaired loans, interest income recognized	13	140
Impaired loans, interest income received	15	108
Commercial and Industrial Loans [Member]
Impaired loans with no related allowance recorded, carrying amount	614	823
Impaired loans with no related allowance recorded, unpaid principal balance	614	823
Impaired loans, related allowances	56	57
Impaired loans with an allowance recorded, carrying amount	56	57
Impaired loans with an allowance recorded, unpaid principal balance	56	57
Impaired loans, carrying amount	670	880
Impaired loans, unpaid principal balance	670	880
Impaired loans, average recorded investment	739	637
Impaired loans, interest income recognized	5	61
Impaired loans, interest income received	5	40
Direct Consumer [Member]
Impaired loans with no related allowance recorded, carrying amount	20	21
Impaired loans with no related allowance recorded, unpaid principal balance	20	21
Impaired loans, carrying amount	20	21
Impaired loans, unpaid principal balance	20	21
Impaired loans, average recorded investment	20	22
Impaired loans, interest income recognized		9
Impaired loans, interest income received	$ 1	$ 2

X

- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
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Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

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