Loans and Allowance for Credit Losses - Activity in the Allowance for Loan Losses, by Portfolio Segment, for the Current Year (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	$ 225,231
Provision for credit loss expense	10,206	$ 10,916
Balance, end of period	227,367
Loans, Excluding Acquired Loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	225,231	196,955
Provision for credit loss expense	10,206	10,916
Charge-offs	(9,828)	(3,149)
Recoveries	1,758	1,835
Net (charge-offs) recoveries	(8,070)	(1,314)
Balance, end of period	227,367	206,557
Loans, Excluding Acquired Loans | Commercial
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	36,470	34,406
Provision for credit loss expense	2,872	(4,804)
Charge-offs	(4,593)	(413)
Recoveries	442	1,067
Net (charge-offs) recoveries	(4,151)	654
Balance, end of period	35,191	30,256
Loans, Excluding Acquired Loans | Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	177,177	150,795
Provision for credit loss expense	5,359	14,021
Charge-offs	(2,857)	(1,204)
Recoveries	735	294
Net (charge-offs) recoveries	(2,122)	(910)
Balance, end of period	180,414	163,906
Loans, Excluding Acquired Loans | Consumer | Credit Card
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	5,868	5,140
Provision for credit loss expense	1,298	2,148
Charge-offs	(1,646)	(1,076)
Recoveries	248	234
Net (charge-offs) recoveries	(1,398)	(842)
Balance, end of period	5,768	6,446
Loans, Excluding Acquired Loans | Consumer | Other Consumer and Other
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	5,716	6,614
Provision for credit loss expense	677	(449)
Charge-offs	(732)	(456)
Recoveries	333	240
Net (charge-offs) recoveries	(399)	(216)
Balance, end of period	$ 5,994	$ 5,949