Goodwill and Other Intangible Assets (Carrying Value of Intangible Assets Subject to Amortization) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Purchase Value	$ 285,807	$ 285,807
Accumulated Amortization	241,170	229,614
Carrying Value	44,637	56,193
Core Deposit Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Purchase Value	235,845	235,845
Accumulated Amortization	209,658	200,045
Carrying Value	26,187	35,800
Credit Card and Trust Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Purchase Value	49,962	49,962
Accumulated Amortization	31,512	29,569
Carrying Value	$ 18,450	$ 20,393