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Fair Value - Assets and Liabilities Recorded at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022 | Sep. 30, 2022
--- | --- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | $ 284,972 | $ 284,509 | $ 283,268
U.S. Treasury & Agency securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 38,252 | 19,147 | 19,144
Mortgage-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 212,846 | 228,676 | 229,178
State and political subdivisions |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 30,780 | 33,191 | 31,106
Asset-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 3,094 | 3,495 | 3,840
Fair Value, Measurements, Recurring | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 | 0
Derivative assets | 0 | 0 | 0
Total assets | 0 | 0 | 0
Derivative liabilities | 0 | 0 | 0
Fair Value, Measurements, Recurring | Level 1 | Interest rate swap agreements |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | 0 | 0 | 0
Derivative liabilities | 0 |  |
Fair Value, Measurements, Recurring | Level 1 | Customer loan interest swap agreements |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | 0 | 0 | 0
Derivative liabilities | 0 | 0 | 0
Fair Value, Measurements, Recurring | Level 1 | U.S. Treasury & Agency securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 | 0
Fair Value, Measurements, Recurring | Level 1 | Mortgage-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 | 0
Fair Value, Measurements, Recurring | Level 1 | State and political subdivisions |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 | 0
Fair Value, Measurements, Recurring | Level 1 | Asset-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 | 0
Fair Value, Measurements, Recurring | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 284,972 | 284,509 | 283,268
Derivative assets | 8,520 | 5,599 | 5,998
Total assets | 293,492 | 290,108 | 289,266
Derivative liabilities | 6,031 | 4,910 | 5,365
Fair Value, Measurements, Recurring | Level 2 | Interest rate swap agreements |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | 2,489 | 689 | 633
Derivative liabilities | 0 |  |
Fair Value, Measurements, Recurring | Level 2 | Customer loan interest swap agreements |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | 6,031 | 4,910 | 5,365
Derivative liabilities | 6,031 | 4,910 | 5,365
Fair Value, Measurements, Recurring | Level 2 | U.S. Treasury & Agency securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 38,252 | 19,147 | 19,144
Fair Value, Measurements, Recurring | Level 2 | Mortgage-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 212,846 | 228,676 | 229,178
Fair Value, Measurements, Recurring | Level 2 | State and political subdivisions |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 30,780 | 33,191 | 31,106
Fair Value, Measurements, Recurring | Level 2 | Asset-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 3,094 | 3,495 | 3,840
Fair Value, Measurements, Recurring | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 | 0
Derivative assets | 0 | 0 | 0
Total assets | 0 | 0 | 0
Derivative liabilities | 0 | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | Interest rate swap agreements |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | 0 | 0 | 0
Derivative liabilities | 0 |  |
Fair Value, Measurements, Recurring | Level 3 | Customer loan interest swap agreements |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | 0 | 0 | 0
Derivative liabilities | 0 | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | U.S. Treasury & Agency securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | Mortgage-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | State and political subdivisions |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | Asset-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 | 0
Fair Value, Measurements, Recurring | Total Fair Value |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 284,972 | 284,509 | 283,268
Derivative assets | 8,520 | 5,599 | 5,998
Total assets | 293,492 | 290,108 | 289,266
Derivative liabilities | 6,031 | 4,910 | 5,365
Fair Value, Measurements, Recurring | Total Fair Value | Interest rate swap agreements |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | 2,489 | 689 | 633
Derivative liabilities | 0 |  |
Fair Value, Measurements, Recurring | Total Fair Value | Customer loan interest swap agreements |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | 6,031 | 4,910 | 5,365
Derivative liabilities | 6,031 | 4,910 | 5,365
Fair Value, Measurements, Recurring | Total Fair Value | U.S. Treasury & Agency securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 38,252 | 19,147 | 19,144
Fair Value, Measurements, Recurring | Total Fair Value | Mortgage-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 212,846 | 228,676 | 229,178
Fair Value, Measurements, Recurring | Total Fair Value | State and political subdivisions |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 30,780 | 33,191 | 31,106
Fair Value, Measurements, Recurring | Total Fair Value | Asset-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | $ 3,094 | $ 3,495 | $ 3,840

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