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Loans and Allowance for Loan Losses - Loans by Portfolio Segment (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2022 | Dec. 31, 2021
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Loans and Leases Receivable Disclosure [Abstract] |  |  |  |
Loans | $ 4,152,644 | $ 4,147,691 |  |
Less: Allowance for loan losses | 36,332 | 36,515 | $ 35,524 | $ 35,273
Total loans | 4,116,312 | 4,111,176 |  |
Construction Real Estate Loans |  |  |  |
Loans and Leases Receivable Disclosure [Abstract] |  |  |  |
Loans | 591,894 | 559,681 |  |
Less: Allowance for loan losses | 3,152 | 3,164 | 3,604 | 3,787
1-4 Family Residential Real Estate Loans |  |  |  |
Loans and Leases Receivable Disclosure [Abstract] |  |  |  |
Loans | 672,595 | 663,519 |  |
Less: Allowance for loan losses | 2,314 | 2,173 | 1,982 | 1,866
Commercial Real Estate Loans |  |  |  |
Loans and Leases Receivable Disclosure [Abstract] |  |  |  |
Loans | 1,990,861 | 1,987,707 |  |
Less: Allowance for loan losses | 28,721 | 28,701 | 27,225 | 26,980
Commercial loans |  |  |  |
Loans and Leases Receivable Disclosure [Abstract] |  |  |  |
Loans | 388,182 | 412,064 |  |
Less: Allowance for loan losses | 1,901 | 2,235 | 2,454 | 2,397
Municipal loans |  |  |  |
Loans and Leases Receivable Disclosure [Abstract] |  |  |  |
Loans | 438,566 | 450,067 |  |
Less: Allowance for loan losses | 44 | 45 | 48 | 47
Loans to individuals |  |  |  |
Loans and Leases Receivable Disclosure [Abstract] |  |  |  |
Loans | 70,546 | 74,653 |  |
Less: Allowance for loan losses | $ 200 | $ 197 | $ 211 | $ 196

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