Fair Value Measurements - Financial Assets and Financial Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Assets
Equity securities, at fair value	$ 787	$ 777
Derivatives designated as hedging instruments
Assets
Derivative assets	1,503	0
Derivatives not designated as hedging instruments
Assets
Derivative assets	1,610	0
Liabilities
Derivatives not designated as hedging instruments	1,826	21
Recurring \| Fair Value
Assets
Available-for-sale securities	1,416,650	1,594,967
Equity securities, at fair value	787	777
Liabilities
Derivatives not designated as hedging instruments	1,826	21
Recurring \| Derivatives designated as hedging instruments \| Fair Value
Assets
Derivative assets	1,503	0
Recurring \| Derivatives not designated as hedging instruments \| Fair Value
Assets
Derivative assets	1,610	0
Recurring \| U.S. Treasuries \| Fair Value
Assets
Available-for-sale securities	109,904	167,251
Recurring \| Obligations of U.S. Government sponsored entities \| Fair Value
Assets
Available-for-sale securities	456,458	601,167
Recurring \| Obligations of U.S. states and political subdivisions \| Fair Value
Assets
Available-for-sale securities	81,924	85,281
Recurring \| U.S. Government agencies \| Fair Value
Assets
Available-for-sale securities	45,240	52,668
Recurring \| U.S. Government sponsored entities \| Fair Value
Assets
Available-for-sale securities	720,830	686,222
Recurring \| U.S. corporate debt securities \| Fair Value
Assets
Available-for-sale securities	2,294	2,378
Recurring \| (Level 1) \| Fair Value
Assets
Available-for-sale securities	0	0
Equity securities, at fair value	0	0
Liabilities
Derivatives not designated as hedging instruments	0	0
Recurring \| (Level 1) \| Derivatives designated as hedging instruments \| Fair Value
Assets
Derivative assets	0	0
Recurring \| (Level 1) \| Derivatives not designated as hedging instruments \| Fair Value
Assets
Derivative assets	0	0
Recurring \| (Level 1) \| U.S. Treasuries \| Fair Value
Assets
Available-for-sale securities	0	0
Recurring \| (Level 1) \| Obligations of U.S. Government sponsored entities \| Fair Value
Assets
Available-for-sale securities	0	0
Recurring \| (Level 1) \| Obligations of U.S. states and political subdivisions \| Fair Value
Assets
Available-for-sale securities	0	0
Recurring \| (Level 1) \| U.S. Government agencies \| Fair Value
Assets
Available-for-sale securities	0	0
Recurring \| (Level 1) \| U.S. Government sponsored entities \| Fair Value
Assets
Available-for-sale securities	0	0
Recurring \| (Level 1) \| U.S. corporate debt securities \| Fair Value
Assets
Available-for-sale securities	0	0
Recurring \| (Level 2) \| Fair Value
Assets
Available-for-sale securities	1,416,650	1,594,967
Equity securities, at fair value	0	0
Liabilities
Derivatives not designated as hedging instruments	1,826	21
Recurring \| (Level 2) \| Derivatives designated as hedging instruments \| Fair Value
Assets
Derivative assets	1,503	0
Recurring \| (Level 2) \| Derivatives not designated as hedging instruments \| Fair Value
Assets
Derivative assets	1,610	0
Recurring \| (Level 2) \| U.S. Treasuries \| Fair Value
Assets
Available-for-sale securities	109,904	167,251
Recurring \| (Level 2) \| Obligations of U.S. Government sponsored entities \| Fair Value
Assets
Available-for-sale securities	456,458	601,167
Recurring \| (Level 2) \| Obligations of U.S. states and political subdivisions \| Fair Value
Assets
Available-for-sale securities	81,924	85,281
Recurring \| (Level 2) \| U.S. Government agencies \| Fair Value
Assets
Available-for-sale securities	45,240	52,668
Recurring \| (Level 2) \| U.S. Government sponsored entities \| Fair Value
Assets
Available-for-sale securities	720,830	686,222
Recurring \| (Level 2) \| U.S. corporate debt securities \| Fair Value
Assets
Available-for-sale securities	2,294	2,378
Recurring \| (Level 3) \| Fair Value
Assets
Available-for-sale securities	0	0
Equity securities, at fair value	787	777
Liabilities
Derivatives not designated as hedging instruments	0	0
Recurring \| (Level 3) \| Derivatives designated as hedging instruments \| Fair Value
Assets
Derivative assets	0	0
Recurring \| (Level 3) \| Derivatives not designated as hedging instruments \| Fair Value
Assets
Derivative assets	0	0
Recurring \| (Level 3) \| U.S. Treasuries \| Fair Value
Assets
Available-for-sale securities	0	0
Recurring \| (Level 3) \| Obligations of U.S. Government sponsored entities \| Fair Value
Assets
Available-for-sale securities	0	0
Recurring \| (Level 3) \| Obligations of U.S. states and political subdivisions \| Fair Value
Assets
Available-for-sale securities	0	0
Recurring \| (Level 3) \| U.S. Government agencies \| Fair Value
Assets
Available-for-sale securities	0	0
Recurring \| (Level 3) \| U.S. Government sponsored entities \| Fair Value
Assets
Available-for-sale securities	0	0
Recurring \| (Level 3) \| U.S. corporate debt securities \| Fair Value
Assets
Available-for-sale securities	$ 0	$ 0