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Loans and Allowance for Loan Losses - Loans by Portfolio Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Loans and Leases Receivable Disclosure [Abstract]
Loans	$ 4,420,633		$ 4,147,691
Less: Allowance for loan losses	41,760	$ 36,303	36,515	$ 36,506	$ 35,449	$ 35,273
Total loans	4,378,873		4,111,176
Construction Real Estate Loans
Loans and Leases Receivable Disclosure [Abstract]
Loans	720,515		559,681
Less: Allowance for loan losses	4,414	3,395	3,164	3,535	3,399	3,787
1-4 Family Residential Real Estate Loans
Loans and Leases Receivable Disclosure [Abstract]
Loans	689,492		663,519
Less: Allowance for loan losses	2,739	2,660	2,173	2,006	2,024	1,866
Commercial Real Estate Loans
Loans and Leases Receivable Disclosure [Abstract]
Loans	2,117,306		1,987,707
Less: Allowance for loan losses	32,339	28,012	28,701	28,494	27,221	26,980
Commercial loans
Loans and Leases Receivable Disclosure [Abstract]
Loans	385,816		412,064
Less: Allowance for loan losses	2,069	2,017	2,235	2,233	2,558	2,397
Municipal loans
Loans and Leases Receivable Disclosure [Abstract]
Loans	441,512		450,067
Less: Allowance for loan losses	20	37	45	44	46	47
Loans to individuals
Loans and Leases Receivable Disclosure [Abstract]
Loans	65,992		74,653
Less: Allowance for loan losses	$ 179	$ 182	$ 197	$ 194	$ 201	$ 196

X

- Definition

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-1

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Amortized cost excluding accrued interest, after allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-1

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-5

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