Fair Value of Financial Instruments and Fair Value Measurements - Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets
Investment securities available for sale, at fair value (amortized cost $431,138 and $455,294, respectively)	$ 382,953	$ 407,382
Investment securities held to maturity	398,852	$ 405,576
Liabilities
Derivative Liability, Statement of Financial Position [Extensible Enumeration]		Other liabilities
Carrying Value
Assets
Cash and short-term investments	94,669	$ 83,322
Investment securities available for sale, at fair value (amortized cost $431,138 and $455,294, respectively)	382,953	407,382
Investment securities held to maturity	447,157	449,031
Other investments	16,034	16,868
Loans held for sale	31,102	27,958
Loans, net	1,840,361	1,865,099
Derivative instruments	361
Liabilities
Deposits	2,522,748	2,544,790
Federal Home Loan Bank advances	155,000	175,000
Other borrowings	62,969	63,445
Derivative instruments		438
Estimated Fair Value
Assets
Cash and short-term investments	94,669	83,322
Investment securities available for sale, at fair value (amortized cost $431,138 and $455,294, respectively)	382,953	407,382
Investment securities held to maturity	398,852	405,576
Other investments	16,034	16,868
Loans held for sale	31,102	27,958
Loans, net	1,674,467	1,699,870
Derivative instruments	361
Liabilities
Deposits	2,516,381	2,538,477
Federal Home Loan Bank advances	157,599	176,022
Other borrowings	50,078	51,056
Derivative instruments		438
Estimated Fair Value | Level 1
Assets
Cash and short-term investments	94,669	83,322
Investment securities available for sale, at fair value (amortized cost $431,138 and $455,294, respectively)	0	0
Investment securities held to maturity	0	0
Other investments	0	0
Loans held for sale	0	0
Loans, net	0	0
Derivative instruments	0
Liabilities
Deposits	0	0
Federal Home Loan Bank advances	0	0
Other borrowings	0	0
Derivative instruments		0
Estimated Fair Value | Level 2
Assets
Cash and short-term investments	0	0
Investment securities available for sale, at fair value (amortized cost $431,138 and $455,294, respectively)	375,808	396,568
Investment securities held to maturity	398,852	405,576
Other investments	16,034	16,868
Loans held for sale	31,102	27,958
Loans, net	0	0
Derivative instruments	361
Liabilities
Deposits	2,516,381	2,538,477
Federal Home Loan Bank advances	157,599	176,022
Other borrowings	50,078	51,056
Derivative instruments		438
Estimated Fair Value | Level 3
Assets
Cash and short-term investments	0	0
Investment securities available for sale, at fair value (amortized cost $431,138 and $455,294, respectively)	7,145	10,814
Investment securities held to maturity	0	0
Other investments	0	0
Loans held for sale	0	0
Loans, net	1,674,467	1,699,870
Derivative instruments	0
Liabilities
Deposits	0	0
Federal Home Loan Bank advances	0	0
Other borrowings	$ 0	0
Derivative instruments		$ 0