Securities - Schedule of Held-to-Maturity Securities Amortized Cost and Estimated Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Amortized Cost
Due after five years through ten years	$ 312,385	$ 312,344
Amortized Cost	312,385	312,344
Fair Value
Due after five years through ten years	252,978	261,692
Total held-to-maturity debt securities	$ 252,978	$ 261,692