Fair Value Measurements - Assets and Liabilities Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Securities available for sale	$ 958,384	$ 955,584
U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Securities available for sale	264,428	255,527
State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Securities available for sale	372,028	382,645
Mortgage-backed securities and collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Securities available for sale	317,336	312,754
Recurring Basis
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Total	958,384	955,584
Recurring Basis \| U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Securities available for sale	264,428	255,527
Recurring Basis \| State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Securities available for sale	372,028	382,645
Recurring Basis \| Mortgage-backed securities and collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Securities available for sale	317,336	312,754
Recurring Basis \| U.S. Government Agency and GSE securities
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Securities available for sale	4,592	4,658
Recurring Basis \| Readily Available Market Prices
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Total	264,428	255,527
Recurring Basis \| Readily Available Market Prices \| U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Securities available for sale	264,428	255,527
Recurring Basis \| Readily Available Market Prices \| State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Securities available for sale	0	0
Recurring Basis \| Readily Available Market Prices \| Mortgage-backed securities and collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Securities available for sale	0	0
Recurring Basis \| Readily Available Market Prices \| U.S. Government Agency and GSE securities
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Securities available for sale	0	0
Recurring Basis \| Observable Market Prices
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Total	693,956	700,057
Recurring Basis \| Observable Market Prices \| U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Securities available for sale	0	0
Recurring Basis \| Observable Market Prices \| State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Securities available for sale	372,028	382,645
Recurring Basis \| Observable Market Prices \| Mortgage-backed securities and collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Securities available for sale	317,336	312,754
Recurring Basis \| Observable Market Prices \| U.S. Government Agency and GSE securities
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Securities available for sale	4,592	4,658
Recurring Basis \| Company Determined Market Prices
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Total	0	0
Recurring Basis \| Company Determined Market Prices \| U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Securities available for sale	0	0
Recurring Basis \| Company Determined Market Prices \| State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Securities available for sale	0	0
Recurring Basis \| Company Determined Market Prices \| Mortgage-backed securities and collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Securities available for sale	0	0
Recurring Basis \| Company Determined Market Prices \| U.S. Government Agency and GSE securities
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Securities available for sale	$ 0	$ 0