Securities, HTM Debt Securities, Contractual Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Held-to-maturity Securities, Debt Maturities, Amortized Cost [Abstract]
Within one year	$ 102,967
From one to five years	58,364
From five to ten years	222,178
After ten years	349,701
Amortized cost	733,210	$ 616,560
Held-to-maturity Securities, Debt Maturities, Estimated Fair Value [Abstract]
Within one year	103,011
From one to five years	59,832
From five to ten years	221,043
After ten years	351,374
Fair value	$ 735,260	$ 636,827