LHFI and ACL, LHFI - Impact of Modifications Classified as Troubled Debt Restructurings (Details) - Troubled Debt Restructurings [Member] $ in Thousands	12 Months Ended
Dec. 31, 2021 USD ($) Contract	Dec. 31, 2020 USD ($) Contract	Dec. 31, 2019 USD ($) Contract
Financing Receivable Modifications [Line Items]
Number of Contracts \| Contract	24	27	30
Pre-Modification Outstanding Recorded Investment	$ 13,337	$ 7,627	$ 15,994
Post-Modification Outstanding Recorded Investment	$ 12,810	$ 7,602	$ 15,877
Construction, Land Development and Other Land [Member] \| Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts \| Contract	5
Pre-Modification Outstanding Recorded Investment	$ 5,582
Post-Modification Outstanding Recorded Investment	$ 5,582
Other Secured by 1-4 Family Residential Properties [Member] \| Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts \| Contract	3	13
Pre-Modification Outstanding Recorded Investment	$ 37	$ 923
Post-Modification Outstanding Recorded Investment	$ 37	$ 929
Secured by Nonfarm, Nonresidential Properties [Member] \| Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts \| Contract	5	2	1
Pre-Modification Outstanding Recorded Investment	$ 5,789	$ 1,111	$ 5,055
Post-Modification Outstanding Recorded Investment	$ 5,265	$ 1,111	$ 5,055
Secured by 1-4 Family Residential Properties [Member] \| Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts \| Contract			19
Pre-Modification Outstanding Recorded Investment			$ 1,742
Post-Modification Outstanding Recorded Investment			$ 1,738
Secured by 1-4 Family Residential Properties [Member] \| Other Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts \| Contract	8
Pre-Modification Outstanding Recorded Investment	$ 909
Post-Modification Outstanding Recorded Investment	$ 906
Commercial and Industrial Loans [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts \| Contract	2	4	8
Pre-Modification Outstanding Recorded Investment	$ 1,014	$ 1,665	$ 9,167
Post-Modification Outstanding Recorded Investment	$ 1,014	$ 1,664	$ 9,054
Consumer Loans [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts \| Contract	1	6	2
Pre-Modification Outstanding Recorded Investment	$ 6	$ 26	$ 30
Post-Modification Outstanding Recorded Investment	$ 6	$ 26	$ 30
State and Other Political Subdivision Loans [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts \| Contract		2
Pre-Modification Outstanding Recorded Investment		$ 3,902
Post-Modification Outstanding Recorded Investment		$ 3,872

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

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Amount, after troubled debt restructuring, of modified financing receivable.

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Amount, before troubled debt restructuring, of financing receivable to be modified.

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