Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair value of assets and liabilities
Investment securities available-for-sale	$ 311,537	$ 379,814
Equity securities	40,835	38,744
Bank-owned life insurance	44,109	43,239
Estimated Fair Value
Fair value of assets and liabilities
Investment securities available-for-sale	311,537	379,814
Equity securities	40,835	38,744
Loans held-for-sale	7,603	24,898
Bank-owned life insurance	44,109	43,239
Level I \| Estimated Fair Value
Fair value of assets and liabilities
Investment securities available-for-sale	98,100	0
Equity securities	4,647	5,382
Loans held-for-sale	0	0
Bank-owned life insurance	0	0
Level II \| Estimated Fair Value
Fair value of assets and liabilities
Investment securities available-for-sale	188,797	344,471
Equity securities	0	0
Loans held-for-sale	7,603	24,898
Bank-owned life insurance	44,109	43,239
Level III \| Estimated Fair Value
Fair value of assets and liabilities
Investment securities available-for-sale	24,640	35,343
Equity securities	36,188	33,362
Loans held-for-sale	0	0
Bank-owned life insurance	0	0
Recurring
Fair value of assets and liabilities
Equity securities	4,647	5,382
Bank-owned life insurance	44,109	43,239
Recurring \| Estimated Fair Value
Fair value of assets and liabilities
Loans held-for-sale	7,603
Recurring \| Level I
Fair value of assets and liabilities
Equity securities	4,647	5,382
Bank-owned life insurance	0	0
Recurring \| Level I \| Estimated Fair Value
Fair value of assets and liabilities
Loans held-for-sale	0
Recurring \| Level II
Fair value of assets and liabilities
Equity securities	0	0
Bank-owned life insurance	44,109	43,239
Recurring \| Level II \| Estimated Fair Value
Fair value of assets and liabilities
Loans held-for-sale	7,603
Recurring \| Level III
Fair value of assets and liabilities
Equity securities	0	0
Bank-owned life insurance	0	0
Recurring \| Level III \| Estimated Fair Value
Fair value of assets and liabilities
Loans held-for-sale	0
United States government agency securities
Fair value of assets and liabilities
Investment securities available-for-sale	37,140	44,814
United States government agency securities \| Recurring
Fair value of assets and liabilities
Investment securities available-for-sale	37,140	44,814
United States government agency securities \| Recurring \| Level I
Fair value of assets and liabilities
Investment securities available-for-sale	0	0
United States government agency securities \| Recurring \| Level II
Fair value of assets and liabilities
Investment securities available-for-sale	37,140	44,814
United States government agency securities \| Recurring \| Level III
Fair value of assets and liabilities
Investment securities available-for-sale	0	0
United States sponsored mortgage-backed securities
Fair value of assets and liabilities
Investment securities available-for-sale	60,481	56,571
United States sponsored mortgage-backed securities \| Recurring
Fair value of assets and liabilities
Investment securities available-for-sale	60,481	56,571
United States sponsored mortgage-backed securities \| Recurring \| Level I
Fair value of assets and liabilities
Investment securities available-for-sale	0	0
United States sponsored mortgage-backed securities \| Recurring \| Level II
Fair value of assets and liabilities
Investment securities available-for-sale	60,481	56,571
United States sponsored mortgage-backed securities \| Recurring \| Level III
Fair value of assets and liabilities
Investment securities available-for-sale	0	0
United States treasury securities
Fair value of assets and liabilities
Investment securities available-for-sale	98,100	120,909
United States treasury securities \| Recurring
Fair value of assets and liabilities
Investment securities available-for-sale	98,100	120,909
United States treasury securities \| Recurring \| Level I
Fair value of assets and liabilities
Investment securities available-for-sale	98,100	0
United States treasury securities \| Recurring \| Level II
Fair value of assets and liabilities
Investment securities available-for-sale	0	120,909
United States treasury securities \| Recurring \| Level III
Fair value of assets and liabilities
Investment securities available-for-sale	0	0
Municipal securities \| Recurring
Fair value of assets and liabilities
Investment securities available-for-sale	98,624	138,636
Municipal securities \| Recurring \| Level I
Fair value of assets and liabilities
Investment securities available-for-sale	0	0
Municipal securities \| Recurring \| Level II
Fair value of assets and liabilities
Investment securities available-for-sale	81,484	103,293
Municipal securities \| Recurring \| Level III
Fair value of assets and liabilities
Investment securities available-for-sale	17,140	35,343
Corporate debt securities
Fair value of assets and liabilities
Investment securities available-for-sale	8,901	10,560
Corporate debt securities \| Recurring
Fair value of assets and liabilities
Investment securities available-for-sale	8,901	10,560
Corporate debt securities \| Recurring \| Level I
Fair value of assets and liabilities
Investment securities available-for-sale	0	0
Corporate debt securities \| Recurring \| Level II
Fair value of assets and liabilities
Investment securities available-for-sale	8,901	10,560
Corporate debt securities \| Recurring \| Level III
Fair value of assets and liabilities
Investment securities available-for-sale	0	0
Other securities
Fair value of assets and liabilities
Investment securities available-for-sale	791	824
Other securities \| Recurring
Fair value of assets and liabilities
Investment securities available-for-sale	791	824
Other securities \| Recurring \| Level I
Fair value of assets and liabilities
Investment securities available-for-sale	0	0
Other securities \| Recurring \| Level II
Fair value of assets and liabilities
Investment securities available-for-sale	791	824
Other securities \| Recurring \| Level III
Fair value of assets and liabilities
Investment securities available-for-sale	0	0
Interest rate swaps \| Estimated Fair Value
Fair value of assets and liabilities
Derivative asset	12,974	8,427
Derivative liability	10,609	8,427
Interest rate swaps \| Level I \| Estimated Fair Value
Fair value of assets and liabilities
Derivative asset	0	0
Derivative liability	0	0
Interest rate swaps \| Level II \| Estimated Fair Value
Fair value of assets and liabilities
Derivative asset	12,974	8,427
Derivative liability	10,609	8,427
Interest rate swaps \| Level III \| Estimated Fair Value
Fair value of assets and liabilities
Derivative asset	0	0
Derivative liability	0	0
Interest rate swaps \| Recurring
Fair value of assets and liabilities
Derivative asset	12,974	8,427
Derivative liability	10,609	8,427
Interest rate swaps \| Recurring \| Level I
Fair value of assets and liabilities
Derivative asset	0	0
Derivative liability	0	0
Interest rate swaps \| Recurring \| Level II
Fair value of assets and liabilities
Derivative asset	12,974	8,427
Derivative liability	10,609	8,427
Interest rate swaps \| Recurring \| Level III
Fair value of assets and liabilities
Derivative asset	0	0
Derivative liability	0	0
Fair value hedge \| Estimated Fair Value
Fair value of assets and liabilities
Derivative asset	204
Derivative liability		572
Fair value hedge \| Level I \| Estimated Fair Value
Fair value of assets and liabilities
Derivative asset	0
Derivative liability		0
Fair value hedge \| Level II \| Estimated Fair Value
Fair value of assets and liabilities
Derivative asset	204
Derivative liability		572
Fair value hedge \| Level III \| Estimated Fair Value
Fair value of assets and liabilities
Derivative asset	0
Derivative liability		0
Fair value hedge \| Recurring
Fair value of assets and liabilities
Derivative asset	204
Derivative liability		572
Fair value hedge \| Recurring \| Level I
Fair value of assets and liabilities
Derivative asset	0
Derivative liability		0
Fair value hedge \| Recurring \| Level II
Fair value of assets and liabilities
Derivative asset	204
Derivative liability		572
Fair value hedge \| Recurring \| Level III
Fair value of assets and liabilities
Derivative asset	0
Derivative liability		0
Embedded derivative \| Estimated Fair Value
Fair value of assets and liabilities
Derivative asset	648	787
Embedded derivative \| Level I \| Estimated Fair Value
Fair value of assets and liabilities
Derivative asset	0	0
Embedded derivative \| Level II \| Estimated Fair Value
Fair value of assets and liabilities
Derivative asset	0	0
Embedded derivative \| Level III \| Estimated Fair Value
Fair value of assets and liabilities
Derivative asset	648	787
Embedded derivative \| Recurring
Fair value of assets and liabilities
Derivative asset	648	787
Embedded derivative \| Recurring \| Level I
Fair value of assets and liabilities
Derivative asset	0	0
Embedded derivative \| Recurring \| Level II
Fair value of assets and liabilities
Derivative asset	0	0
Embedded derivative \| Recurring \| Level III
Fair value of assets and liabilities
Derivative asset	$ 648	$ 787

The carrying amount of a life insurance policy on an officer, executive or employee for which the reporting entity (a bank) is entitled to proceeds from the policy upon death of the insured or surrender of the insurance policy.

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- Definition

Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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