Premises and Equipment - Net of Accumulated Depreciation (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Premises and Equipment, Net of Accumulated Depreciation
Accumulated depreciation	$ (207,743)	$ (201,159)
Net premises and equipment, excluding ROU assets	411,968	356,728
ROU assets, net	56,252	65,063
Net premises and equipment	468,220	421,791
Land
Premises and Equipment, Net of Accumulated Depreciation
Premises and equipment, gross	84,402	76,557
Buildings and construction in progress
Premises and Equipment, Net of Accumulated Depreciation
Premises and equipment, gross	395,458	344,906
Furniture, fixtures and equipment
Premises and Equipment, Net of Accumulated Depreciation
Premises and equipment, gross	123,901	120,096
Leasehold improvements
Premises and Equipment, Net of Accumulated Depreciation
Premises and equipment, gross	$ 15,950	$ 16,328