Premises and Equipment (Schedule of Premises and Equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Gross land, buildings and equipment	$ 1,108,220	$ 1,090,607
Less accumulated depreciation and amortization	632,945	621,548
Net premises and equipment	475,275	469,059
Land [Member]
Property, Plant and Equipment [Line Items]
Gross land, buildings and equipment	86,378	88,564
Building and improvements [Member]
Property, Plant and Equipment [Line Items]
Gross land, buildings and equipment	750,464	730,445
Equipment [Member]
Property, Plant and Equipment [Line Items]
Gross land, buildings and equipment	240,046	244,636
Right of use leased assets [Member]
Property, Plant and Equipment [Line Items]
Gross land, buildings and equipment	$ 31,332	$ 26,962