Loans and Allowance for Credit Losses - Activity in the Allowance for Loan Losses, by Portfolio Segment, for the Current Year (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	$ 225,231
Provision for credit loss expense	46,785	$ 47,424	$ (5,379)
Balance, end of period	235,019	225,231
Loans, Excluding Acquired Loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	225,231	196,955	205,332
Acquisition adjustment for PCD loans			9,622
Provision for credit loss expense	46,785	47,424	(5,379)
Charge-offs	(42,564)	(26,172)	(24,130)
Recoveries	5,567	7,024	11,510
Net charge-offs	(36,997)	(19,148)	(12,620)
Balance, end of period	235,019	225,231	196,955
Loans, Excluding Acquired Loans | Other Consumer and Other
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	5,716	6,614	4,617
Acquisition adjustment for PCD loans			2
Provision for credit loss expense	662	86	2,674
Charge-offs	(2,311)	(2,522)	(1,876)
Recoveries	1,396	1,538	1,197
Net charge-offs	(915)	(984)	(679)
Balance, end of period	5,463	5,716	6,614
Loans, Excluding Acquired Loans | Commercial
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	36,470	34,406	17,458
Acquisition adjustment for PCD loans			6,433
Provision for credit loss expense	30,389	5,934	22,412
Charge-offs	(26,867)	(5,962)	(14,270)
Recoveries	1,595	2,092	2,373
Net charge-offs	(25,272)	(3,870)	(11,897)
Balance, end of period	41,587	36,470	34,406
Loans, Excluding Acquired Loans | Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	177,177	150,795	179,270
Acquisition adjustment for PCD loans			3,187
Provision for credit loss expense	10,249	36,381	(34,456)
Charge-offs	(6,949)	(12,385)	(4,122)
Recoveries	1,485	2,386	6,916
Net charge-offs	(5,464)	(9,999)	2,794
Balance, end of period	181,962	177,177	150,795
Loans, Excluding Acquired Loans | Consumer | Credit Card
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	5,868	5,140	3,987
Acquisition adjustment for PCD loans			0
Provision for credit loss expense	5,485	5,023	3,991
Charge-offs	(6,437)	(5,303)	(3,862)
Recoveries	1,091	1,008	1,024
Net charge-offs	(5,346)	(4,295)	(2,838)
Balance, end of period	$ 6,007	$ 5,868	$ 5,140