Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest income
Interest and fees on loans		$ 992,642	$ 693,729	$ 785,241
Interest and dividends on investment securities
Taxable		75,444	37,916	59,806
Tax-exempt		65,691	58,710	58,320
Other interest		11,475	7,833	9,473
Total interest income		1,145,252	798,189	912,840
Interest expense
Interest on deposits		98,309	18,622	67,639
Interest on federal funds purchased and securities sold under agreements to repurchase		3,480	143	485
Interest on other short-term funding		2	22	51
Interest on PPPLF Funding		0	0	1,984
Interest on FHLB advances		75,487	36,493	57,359
Interest on long-term funding		10,653	17,053	22,365
Total interest expense		187,931	72,334	149,883
Net interest income		957,321	725,855	762,957
Provision for credit losses		32,998	(88,011)	174,006
Net interest income after provision for credit losses		924,323	813,866	588,950
Noninterest income
Noninterest Income In Scope of Topic 606		201,953	212,278	246,077
Capital markets, net		29,917	30,602	27,966
Mortgage banking, net		18,873	50,751	45,580
Bank Owned Life Insurance Income		11,431	13,254	13,771
Asset gains, net(a)	[1]	1,338	11,009	155,589
Investment securities gains (losses), net		3,746	(16)	9,222
Gains on sale of branches, net(b)		0	1,038	7,449
Other(c)		10,715	11,366	55,445
Total noninterest income		282,370	332,364	514,056
Noninterest expense
Personnel		454,101	426,687	432,151
Technology		90,700	81,689	81,214
Occupancy		59,794	63,513	64,064
Business development and advertising		25,525	21,149	18,428
Equipment		19,632	21,104	21,705
Legal and professional		18,250	21,923	21,546
Loan and foreclosure costs		5,925	8,143	12,600
FDIC assessment		22,650	18,150	20,350
Other intangible amortization		8,811	8,844	10,192
Loss on prepayments of FHLB advances		0	0
Other		41,675	38,721	49,135
Total noninterest expense		747,063	709,924	776,034
Income before income tax expense		459,630	436,307	326,972
Income tax expense		93,508	85,313	20,200
Net income		366,122	350,994	306,771
Preferred stock dividends		11,500	17,111	18,358
Net income available to common equity		$ 354,622	$ 333,883	$ 288,413
Earnings per common share
Basic		$ 2.36	$ 2.20	$ 1.87
Diluted		$ 2.34	$ 2.18	$ 1.86
Average common shares outstanding
Basic		149,162	150,773	153,005
Diluted		150,496	151,987	153,642
Wealth management fees
Noninterest income
Noninterest Income In Scope of Topic 606	[2]	$ 84,122	$ 89,854	$ 84,957
Service charges and deposit account fees
Noninterest income
Noninterest Income In Scope of Topic 606		62,310	64,406	56,307
Card-based fees
Noninterest income
Noninterest Income In Scope of Topic 606		44,132	43,124	38,605
Revenue from Contract with Customer, Including Assessed Tax		44,014	43,014	38,534
Other fee-based revenue
Noninterest income
Noninterest Income In Scope of Topic 606		11,389	14,894	66,208
Revenue from Contract with Customer, Including Assessed Tax		$ 15,903	$ 17,086	19,238
Risk Management and Shared Serivies [Member]
Noninterest expense
Loss on prepayments of FHLB advances				44,650
Risk Management and Shared Serivies [Member] | ABRC [Member]
Average common shares outstanding
Gain (Loss) on Disposition of Assets for Financial Service Operations				$ 163,000

[1] The year ended December 31, 2020 includes a gain of $163 million from the sale of ABRC. See Note 2 Acquisitions and Dispositions for additional details on the sale of ABRC. (b) 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. (c) Includes insurance commissions and fees, which were elevated prior to the sale of ABRC.

[2] (a)