Securities (Held-to-maturity by Contractual Maturity Date) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Amortized Cost
Due in one year or less	$ 150,126
Due from five years to ten years	47,513
Due after ten years	55,076
Securities held to maturity, amortized cost	252,715
Mortgage-backed securities	29,598
Amortized cost, post ASU 2019-04	282,313
Fair Value
Due in one year or less	147,201
Due from five years to ten years	39,301
Due after ten years	45,403
Securities held to maturity, fair value	231,905
Mortgage-backed securities	24,420
Total	$ 256,325	$ 260,613