Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Interest income
Interest and fees on loans		$ 1,720,406	$ 992,642	$ 693,729
Interest and dividends on investment securities
Taxable		146,006	75,444	37,916
Tax-exempt		63,233	65,691	58,710
Other interest		28,408	11,475	7,833
Total interest income		1,958,052	1,145,252	798,189
Interest expense
Interest on deposits		673,624	98,309	18,622
Interest on federal funds purchased and securities sold under agreements to repurchase		12,238	3,480	143
Interest on other short-term funding		1	2	22
Interest on FHLB advances		196,535	75,487	36,493
Interest on long-term funding		36,080	10,653	17,053
Total interest expense		918,479	187,931	72,334
Net interest income		1,039,573	957,321	725,855
Provision for credit losses		83,021	32,998	(88,011)
Net interest income after provision for credit losses		956,552	924,323	813,866
Noninterest income
Noninterest Income In Scope of Topic 606		186,560	201,953	212,278
Capital markets, net		24,649	29,917	30,602
Mortgage banking, net		19,429	18,873	50,751
Gain (Loss) on Sale of Mortgage Loans		(136,239)	0	0
Bank Owned Life Insurance Income		10,266	11,431	13,254
Asset gains, net	[1]	454	1,338	11,009
Investment securities (losses) gains, net		(58,903)	3,746	(16)
Gains on sale of branches, net(a)		0	0	1,038
Other		9,691	10,715	11,366
Total noninterest income		63,182	282,370	332,364
Noninterest expense
Personnel		468,355	454,101	426,687
Technology		102,018	90,700	81,689
Occupancy		57,204	59,794	63,513
Business development and advertising		28,405	25,525	21,149
Equipment		19,663	19,632	21,104
Legal and professional		19,911	18,250	21,923
Loan and foreclosure costs		5,408	5,925	8,143
FDIC assessment		67,072	22,650	18,150
Other intangible amortization		8,811	8,811	8,844
Other		36,837	41,675	38,721
Total noninterest expense		813,682	747,063	709,924
Income before income tax expense		206,052	459,630	436,307
Income tax expense		23,097	93,508	85,313
Net income		182,956	366,122	350,994
Preferred stock dividends		11,500	11,500	17,111
Net income available to common equity		$ 171,456	$ 354,622	$ 333,883
Earnings per common share
Basic		$ 1.14	$ 2.36	$ 2.20
Diluted		$ 1.13	$ 2.34	$ 2.18
Average common shares outstanding
Basic		149,968	149,162	150,773
Diluted		150,860	150,496	151,987
Wealth management fees
Noninterest income
Noninterest Income In Scope of Topic 606	[2]	$ 82,502	$ 84,122	$ 89,854
Service charges and deposit account fees
Noninterest income
Noninterest Income In Scope of Topic 606		49,045	62,310	64,406
Card-based fees
Noninterest income
Noninterest Income In Scope of Topic 606		45,121	44,132	43,124
Revenue from Contract with Customer, Including Assessed Tax		45,020	44,014	43,014
Other fee-based revenue
Noninterest income
Noninterest Income In Scope of Topic 606		9,891	11,389	14,894
Revenue from Contract with Customer, Including Assessed Tax		$ 17,268	$ 15,903	$ 17,086

[1] Includes the deposit premium on the sale of branches net of miscellaneous costs to sell. See Note 2 Acquisitions and Dispositions for additional details on the branch sales.

[2] (a)