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Loans and Allowance for Loan Losses - Loans by Portfolio Segment (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Loans and Leases Receivable Disclosure [Abstract]
Loans	$ 3,800,916	$ 3,645,162
Less: Allowance for loan losses	35,524	35,273	$ 41,454	$ 49,006
Total loans	3,765,392	3,609,889
Construction Real Estate Loans
Loans and Leases Receivable Disclosure [Abstract]
Loans	490,166	447,860
Less: Allowance for loan losses	3,604	3,787	8,201	6,490
1-4 Family Residential Real Estate Loans
Loans and Leases Receivable Disclosure [Abstract]
Loans	647,837	651,140
Less: Allowance for loan losses	1,982	1,866	2,508	2,270
Commercial Real Estate Loans
Loans and Leases Receivable Disclosure [Abstract]
Loans	1,722,577	1,598,172
Less: Allowance for loan losses	27,225	26,980	27,236	35,709
Commercial loans
Loans and Leases Receivable Disclosure [Abstract]
Loans	401,144	418,998
Less: Allowance for loan losses	2,454	2,397	3,108	4,107
Municipal loans
Loans and Leases Receivable Disclosure [Abstract]
Loans	455,155	443,078
Less: Allowance for loan losses	48	47	46	46
Loans to individuals
Loans and Leases Receivable Disclosure [Abstract]
Loans	84,037	85,914
Less: Allowance for loan losses	$ 211	$ 196	$ 355	$ 384

X

- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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