Securities, AFS Debt Securities, Contractual Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Available-for-sale Securities, Debt Maturities, Amortized Cost [Abstract]
Within one year	$ 994
From one to five years	200,771
From five to ten years	756,482
After ten years	804,444
Amortized cost	1,762,691	$ 1,694,806
Available-for-sale Securities, Debt Maturities, Estimated Fair Value [Abstract]
Within one year	996
From one to five years	189,668
From five to ten years	689,296
After ten years	739,396
Fair value	$ 1,619,356	$ 1,687,361