Commitments and Contingencies (Off-Balance Sheet Financial Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Commitments to Extend Credit [Member]
Loss Contingencies [Line Items]
Contract amounts	$ 10,044,537	$ 10,202,464
Letters of Credit [Member]
Loss Contingencies [Line Items]
Contract amounts	$ 428,228	$ 400,505