Fair Value Measurements - Summary of Financial Assets and Financial Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Assets
Equity securities, at fair value	$ 741	$ 777
Designated as Hedging Instrument
Assets
Derivative asset	3,991	0
Not Designated as Hedging Instrument
Assets
Derivative asset	47	0
Liabilities
Derivatives not designated as hedging instruments	56	21
Recurring | Level 1
Assets
Available-for-sale securities	0	0
Liabilities
Derivatives not designated as hedging instruments	0	0
Recurring | Level 1 | Designated as Hedging Instrument
Assets
Derivative asset	0
Recurring | Level 1 | Not Designated as Hedging Instrument
Assets
Derivative asset	0
Recurring | Level 2
Assets
Available-for-sale securities	1,388,510	1,594,967
Liabilities
Derivatives not designated as hedging instruments	56	21
Recurring | Level 2 | Designated as Hedging Instrument
Assets
Derivative asset	3,991
Recurring | Level 2 | Not Designated as Hedging Instrument
Assets
Derivative asset	47
Recurring | Level 3
Assets
Available-for-sale securities	0	0
Liabilities
Derivatives not designated as hedging instruments	0	0
Recurring | Level 3 | Designated as Hedging Instrument
Assets
Derivative asset	0
Recurring | Level 3 | Not Designated as Hedging Instrument
Assets
Derivative asset	0
Recurring | U.S. Treasuries | Level 1
Assets
Available-for-sale securities	0	0
Recurring | U.S. Treasuries | Level 2
Assets
Available-for-sale securities	107,294	167,251
Recurring | U.S. Treasuries | Level 3
Assets
Available-for-sale securities	0	0
Recurring | Obligations of U.S. Government sponsored entities | Level 1
Assets
Available-for-sale securities	0	0
Recurring | Obligations of U.S. Government sponsored entities | Level 2
Assets
Available-for-sale securities	459,941	601,167
Recurring | Obligations of U.S. Government sponsored entities | Level 3
Assets
Available-for-sale securities	0	0
Recurring | Obligations of U.S. states and political subdivisions | Level 1
Assets
Available-for-sale securities	0	0
Recurring | Obligations of U.S. states and political subdivisions | Level 2
Assets
Available-for-sale securities	77,237	85,281
Recurring | Obligations of U.S. states and political subdivisions | Level 3
Assets
Available-for-sale securities	0	0
Recurring | U.S. Government agencies | Level 1
Assets
Available-for-sale securities	0	0
Recurring | U.S. Government agencies | Level 2
Assets
Available-for-sale securities	45,399	52,668
Recurring | U.S. Government agencies | Level 3
Assets
Available-for-sale securities	0	0
Recurring | U.S. Government sponsored entities | Level 1
Assets
Available-for-sale securities	0	0
Recurring | U.S. Government sponsored entities | Level 2
Assets
Available-for-sale securities	696,309	686,222
Recurring | U.S. Government sponsored entities | Level 3
Assets
Available-for-sale securities	0	0
Recurring | U.S. corporate debt securities | Level 1
Assets
Available-for-sale securities	0	0
Recurring | U.S. corporate debt securities | Level 2
Assets
Available-for-sale securities	2,330	2,378
Recurring | U.S. corporate debt securities | Level 3
Assets
Available-for-sale securities	0	0
Recurring | Equity securities | Level 1
Assets
Equity securities, at fair value	0	0
Recurring | Equity securities | Level 2
Assets
Equity securities, at fair value	0	0
Recurring | Equity securities | Level 3
Assets
Equity securities, at fair value	741	777
Recurring | Fair Value
Assets
Available-for-sale securities	1,388,510	1,594,967
Liabilities
Derivatives not designated as hedging instruments	56	21
Recurring | Fair Value | Designated as Hedging Instrument
Assets
Derivative asset	3,991
Recurring | Fair Value | Not Designated as Hedging Instrument
Assets
Derivative asset	47
Recurring | Fair Value | U.S. Treasuries
Assets
Available-for-sale securities	107,294	167,251
Recurring | Fair Value | Obligations of U.S. Government sponsored entities
Assets
Available-for-sale securities	459,941	601,167
Recurring | Fair Value | Obligations of U.S. states and political subdivisions
Assets
Available-for-sale securities	77,237	85,281
Recurring | Fair Value | U.S. Government agencies
Assets
Available-for-sale securities	45,399	52,668
Recurring | Fair Value | U.S. Government sponsored entities
Assets
Available-for-sale securities	696,309	686,222
Recurring | Fair Value | U.S. corporate debt securities
Assets
Available-for-sale securities	2,330	2,378
Recurring | Fair Value | Equity securities
Assets
Equity securities, at fair value	$ 741	$ 777