Securities, AFS Debt Securities, Contractual Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Available-for-sale Securities, Debt Maturities, Amortized Cost [Abstract]
Within one year	$ 50,389
From one to five years	536,097
From five to ten years	356,944
After ten years	671,648
Amortized cost	1,615,078	$ 1,743,882
Available-for-sale Securities, Debt Maturities, Estimated Fair Value [Abstract]
Within one year	49,462
From one to five years	483,546
From five to ten years	315,359
After ten years	582,491
Fair value	$ 1,430,858	$ 1,527,225