Premises and Equipment, Summary Composition (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 440,124	$ 402,840
Property, Plant and Equipment, Net, Total	381,624	379,093
Depreciation	50,356	48,845	$ 46,989
Property, Plant and Equipment, Gross	821,748	781,932
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	64,447	63,642
Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	25,183	22,911
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	433,010	415,690
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	62,050	60,198
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	120,301	116,482
Operating Leases [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	64,251	56,818
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 52,506	$ 46,192