Bank Premises and Equipment - Summary of Bank Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property Plant And Equipment [Line Items]
Gross	$ 272,511	$ 268,738
Less: accumulated depreciation and amortization	(120,723)	(115,765)
Total bank premises and equipment	151,788	152,973
Land [Member]
Property Plant And Equipment [Line Items]
Land	39,481	38,703
Buildings [Member]
Property Plant And Equipment [Line Items]
Buildings	$ 167,450	164,371
Buildings [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Useful Life in years	20 years
Buildings [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Useful Life in years	40 years
Furniture and Equipment [Member]
Property Plant And Equipment [Line Items]
Furniture and equipment	$ 62,644	62,715
Furniture and Equipment [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Useful Life in years	3 years
Furniture and Equipment [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Useful Life in years	10 years
Leasehold Improvements [Member]
Property Plant And Equipment [Line Items]
Leasehold improvements	$ 2,936	$ 2,949
Leasehold Improvements [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Useful Life in years	5 years
Leasehold Improvements [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Useful Life in years	15 years