Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI - Impact of Modifications Classified as Troubled Debt Restructurings (Details) - Troubled Debt Restructurings [Member] $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($) Contract	Jun. 30, 2021 USD ($) Contract	Jun. 30, 2022 USD ($) Contract	Jun. 30, 2021 USD ($) Contract
Financing Receivable Modifications [Line Items]
Number of Contracts | Contract	9	13	14	16
Pre-Modification Outstanding Recorded Investment	$ 2,125	$ 12,048	$ 7,832	$ 12,188
Post-Modification Outstanding Recorded Investment	$ 2,145	$ 12,048	$ 7,851	$ 12,188
Construction, Land Development and Other Land [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | Contract	1	5	1	5
Pre-Modification Outstanding Recorded Investment	$ 146	$ 5,582	$ 146	$ 5,582
Post-Modification Outstanding Recorded Investment	$ 146	$ 5,582	$ 146	$ 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	1	3	2	3
Pre-Modification Outstanding Recorded Investment	$ 42	$ 37	$ 73	$ 37
Post-Modification Outstanding Recorded Investment	$ 42	$ 37	$ 73	$ 37
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | Contract	1	1	3	1
Pre-Modification Outstanding Recorded Investment	$ 895	$ 377	$ 6,004	$ 377
Post-Modification Outstanding Recorded Investment	$ 895	$ 377	$ 6,004	$ 377
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | Contract	5	1	6	3
Pre-Modification Outstanding Recorded Investment	$ 957	$ 123	$ 1,024	$ 249
Post-Modification Outstanding Recorded Investment	$ 977	$ 123	$ 1,043	$ 249
Commercial and Industrial Loans [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | Contract		1	1	2
Pre-Modification Outstanding Recorded Investment		$ 1,000	$ 500	$ 1,014
Post-Modification Outstanding Recorded Investment		$ 1,000	$ 500	$ 1,014
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | Contract	1		1
Pre-Modification Outstanding Recorded Investment	$ 85		$ 85
Post-Modification Outstanding Recorded Investment	$ 85		$ 85
Other Commercial Loans [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | Contract		2		2
Pre-Modification Outstanding Recorded Investment		$ 4,929		$ 4,929
Post-Modification Outstanding Recorded Investment		$ 4,929		$ 4,929