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Loans and Allowance for Loan Losses - Aging of Past Due Loans by Class of Loan (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Loans	$ 3,800,916	$ 3,645,162
Financial Asset, Current
Financing Receivable, Past Due [Line Items]
Loans	3,794,206	3,636,828
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	5,098	6,507
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	816	956
Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	796	871
Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Loans	6,710	8,334
Construction Real Estate Loans
Financing Receivable, Past Due [Line Items]
Loans	490,166	447,860
Construction Real Estate Loans | Financial Asset, Current
Financing Receivable, Past Due [Line Items]
Loans	490,116	447,720
Construction Real Estate Loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	38	82
Construction Real Estate Loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	12	58
Construction Real Estate Loans | Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Construction Real Estate Loans | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Loans	50	140
1-4 Family Residential Real Estate Loans
Financing Receivable, Past Due [Line Items]
Loans	647,837	651,140
1-4 Family Residential Real Estate Loans | Financial Asset, Current
Financing Receivable, Past Due [Line Items]
Loans	644,106	647,081
1-4 Family Residential Real Estate Loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	3,040	3,226
1-4 Family Residential Real Estate Loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	437	606
1-4 Family Residential Real Estate Loans | Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	254	227
1-4 Family Residential Real Estate Loans | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Loans	3,731	4,059
Commercial Real Estate Loans
Financing Receivable, Past Due [Line Items]
Loans	1,722,577	1,598,172
Commercial Real Estate Loans | Financial Asset, Current
Financing Receivable, Past Due [Line Items]
Loans	1,721,708	1,596,882
Commercial Real Estate Loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	747	1,191
Commercial Real Estate Loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	122	0
Commercial Real Estate Loans | Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	99
Commercial Real Estate Loans | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Loans	869	1,290
Commercial loans
Financing Receivable, Past Due [Line Items]
Loans	401,144	418,998
Commercial loans | Financial Asset, Current
Financing Receivable, Past Due [Line Items]
Loans	399,287	416,687
Commercial loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	1,100	1,523
Commercial loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	245	251
Commercial loans | Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	512	537
Commercial loans | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Loans	1,857	2,311
Municipal loans
Financing Receivable, Past Due [Line Items]
Loans	455,155	443,078
Municipal loans | Financial Asset, Current
Financing Receivable, Past Due [Line Items]
Loans	455,155	442,908
Municipal loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	170
Municipal loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Municipal loans | Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Municipal loans | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	170
Loans to individuals
Financing Receivable, Past Due [Line Items]
Loans	84,037	85,914
Loans to individuals | Financial Asset, Current
Financing Receivable, Past Due [Line Items]
Loans	83,834	85,550
Loans to individuals | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	173	315
Loans to individuals | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	41
Loans to individuals | Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	30	8
Loans to individuals | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Loans	$ 203	$ 364

X

- Definition

Amount excluding accrued interest, before allowance for credit loss, of financing receivable.

+ 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 http://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 http://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 http://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447

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+ References

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