Goodwill and Other Intangible Assets (Carrying Value of Intangible Assets Subject to Amortization) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Purchase Value	$ 285,807	$ 285,807
Accumulated Amortization	229,614	215,581
Carrying Value	56,193	70,226
Core Deposit Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Purchase Value	235,845	235,845
Accumulated Amortization	200,045	188,135
Carrying Value	35,800	47,710
Credit Card and Trust Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Purchase Value	49,962	49,962
Accumulated Amortization	29,569	27,446
Carrying Value	$ 20,393	$ 22,516