Loans and Allowance for Credit Losses - Collateral Loan (Details) - USD ($) $ in Thousands	Jun. 30, 2023		Mar. 31, 2023	Dec. 31, 2022		Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment				$ 20,361
Allowance Allocated	$ 22,236	[1]	$ 21,979	15,588	[1]	$ 15,353	$ 14,279	$ 16,903
Commercial, Financial, and Agricultural
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment				295
Allowance Allocated	1,844		1,921	2,735		3,005	2,830	2,717
Real estate mortgage − residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment				1,863
Allowance Allocated	5,465		5,262	3,329		2,747	2,578	2,482
Real estate mortgage − commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment				18,110
Allowance Allocated	10,295		$ 9,487	$ 8,000		$ 8,410	$ 7,692	$ 10,662
Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	2,805
Real Estate | Commercial, Financial, and Agricultural
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0
Real Estate | Real estate mortgage − residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	145
Real Estate | Real estate mortgage − commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	2,660
Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	50
Other | Commercial, Financial, and Agricultural
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	50
Other | Real estate mortgage − residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0
Other | Real estate mortgage − commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0
Allowance Allocated
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Allocated	25
Allowance Allocated | Commercial, Financial, and Agricultural
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Allocated	0
Allowance Allocated | Real estate mortgage − residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Allocated	25
Allowance Allocated | Real estate mortgage − commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Allocated	$ 0

[1] amounts include the impacts of the January 1, 2023 adoption of ASU 2016-13. See Note 2 for details.See accompanying notes to the consolidated financial statements (unaudited)