CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest Income
Interest and fees on loans	$ 1,828,477	$ 1,257,389	$ 1,284,707
Interest and dividends on investment securities:
Taxable	105,716	56,026	70,249
Tax-exempt	17,958	11,716	14,563
Dividends	11,468	7,357	11,644
Interest on federal funds sold and other short-term investments	13,064	1,738	2,556
Total interest income	1,976,683	1,334,226	1,383,719
Interest on deposits:
Savings, NOW and money market	186,709	42,879	76,169
Time	69,691	25,094	106,067
Interest on short-term borrowings	17,453	5,374	11,372
Interest on long-term borrowings and junior subordinated debentures	47,190	50,978	71,207
Total interest expense	321,043	124,325	264,815
Net Interest Income	1,655,640	1,209,901	1,118,904
Debt Securities, Held-to-Maturity, Credit Loss Expense (Reversal)	481	(263)	635
Provision for credit losses for loans	56,336	32,896	125,087
Net Interest Income After Provision for Credit Losses	1,598,823	1,177,268	993,182
Non-Interest Income
Insurance commissions	11,975	7,810	7,398
Capital markets	52,362	27,377	58,962
(Losses) gains on securities transactions, net	(1,230)	1,758	524
Fees from loan servicing	11,273	11,651	10,352
Gains on sales of loans, net	6,418	26,669	42,251
Bank owned life insurance	8,040	8,817	10,083
Other	46,316	34,597	22,790
Total non-interest income	206,793	155,013	183,032
Non-Interest Expense
Salary and employee benefits expense	526,737	375,865	333,221
Net occupancy expense	94,352	79,355	81,538
Technology, furniture and equipment expense	161,752	89,221	76,889
FDIC insurance assessment	22,836	14,183	18,949
Amortization of other intangible assets	37,825	21,827	24,645
Professional and legal fees	82,618	38,432	32,348
Loss on extinguishment of debt	0	8,406	12,036
Amortization of tax credit investments	12,407	10,910	13,335
Other	86,422	53,343	53,187
Total non-interest expense	1,024,949	691,542	646,148
Income Before Income Taxes	780,667	640,739	530,066
Income tax expense	211,816	166,899	139,460
Net Income	568,851	473,840	390,606
Dividends on preferred stock	13,146	12,688	12,688
Net Income Available to Common Shareholders	$ 555,705	$ 461,152	$ 377,918
Earnings Per Common Share:
Basic (in USD per share)	$ 1.14	$ 1.13	$ 0.94
Diluted (in USD per share)	$ 1.14	$ 1.12	$ 0.93
Weighted Average Number of Common Shares Outstanding:
Basic (in shares)	485,434,918	407,445,379	403,754,356
Diluted (in shares)	487,817,710	410,018,328	405,046,207
Wealth management and trust fees
Non-Interest Income
Services	$ 34,709	$ 14,910	$ 12,415
Service charges on deposit accounts
Non-Interest Income
Services	$ 36,930	$ 21,424	$ 18,257