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Loans and Allowance for Loan Losses - Loans by Portfolio Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Loans and Leases Receivable Disclosure [Abstract]
Loans	$ 3,963,041		$ 3,645,162
Less: Allowance for loan losses	35,449	$ 35,524	35,273	$ 42,913	$ 41,454	$ 49,006
Total loans	3,927,592		3,609,889
Construction Real Estate Loans
Loans and Leases Receivable Disclosure [Abstract]
Loans	520,484		447,860
Less: Allowance for loan losses	3,399	3,604	3,787	8,018	8,201	6,490
1-4 Family Residential Real Estate Loans
Loans and Leases Receivable Disclosure [Abstract]
Loans	640,706		651,140
Less: Allowance for loan losses	2,024	1,982	1,866	2,520	2,508	2,270
Commercial Real Estate Loans
Loans and Leases Receivable Disclosure [Abstract]
Loans	1,834,734		1,598,172
Less: Allowance for loan losses	27,221	27,225	26,980	28,930	27,236	35,709
Commercial loans
Loans and Leases Receivable Disclosure [Abstract]
Loans	428,974		418,998
Less: Allowance for loan losses	2,558	2,454	2,397	3,097	3,108	4,107
Municipal loans
Loans and Leases Receivable Disclosure [Abstract]
Loans	457,239		443,078
Less: Allowance for loan losses	46	48	47	47	46	46
Loans to individuals
Loans and Leases Receivable Disclosure [Abstract]
Loans	80,904		85,914
Less: Allowance for loan losses	$ 201	$ 211	$ 196	$ 301	$ 355	$ 384

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

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- Definition

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 3B
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447

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