Securities, AFS Debt Securities, Contractual Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Available-for-sale Securities, Debt Maturities, Amortized Cost [Abstract]
Within one year	$ 10,194
From one to five years	440,801
From five to ten years	508,775
After ten years	712,421
Amortized cost	1,672,191	$ 1,743,882
Available-for-sale Securities, Debt Maturities, Estimated Fair Value [Abstract]
Within one year	10,009
From one to five years	393,528
From five to ten years	438,195
After ten years	612,194
Fair value	$ 1,453,926	$ 1,527,225