Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Interest Income:
Interest and fees on loans and leases	$ 771,973	$ 431,538	$ 1,488,329	$ 777,814
Taxable interest and dividends on investments	147,467	69,538	248,339	123,262
Non-taxable interest on investment securities	13,535	12,664	27,219	22,466
Loans held for sale	421	7	437	33
Total interest income	933,396	513,747	1,764,324	923,575
Interest Expense:
Deposits	251,466	12,459	401,670	19,858
Securities sold under agreements to repurchase and other borrowings	63	2,677	7,890	3,634
Federal Home Loan Bank advances	88,556	3,164	156,682	3,220
Long-term debt	9,482	8,787	18,970	15,955
Total interest expense	349,567	27,087	585,212	42,667
Net interest income	583,829	486,660	1,179,112	880,908
Provision for credit losses	31,498	12,243	78,247	201,088
Net interest income after provision for credit losses	552,331	474,417	1,100,865	679,820
Non-interest Income:
Deposit service fees	45,418	51,385	90,854	99,212
Loan and lease related fees	20,528	27,907	43,533	50,586
Wealth and investment services	7,391	11,244	13,978	21,841
Mortgage banking activities	129	102	188	530
Cash surrender value of life insurance policies	6,293	8,244	13,021	14,976
(Loss) on sale of investment securities	(48)	0	(16,795)	0
Other income	9,663	22,051	15,361	37,823
Total non-interest income	89,374	120,933	160,140	224,968
Non-interest Expense:
Compensation and benefits	173,305	187,656	346,505	371,658
Occupancy	20,254	51,593	40,425	70,208
Technology and equipment	51,815	41,498	96,181	96,899
Intangible assets amortization	9,193	8,802	18,690	15,189
Marketing	5,160	3,441	8,636	6,950
Professional and outside services	29,385	15,332	61,819	69,423
Deposit insurance	13,723	6,748	26,046	11,970
Other expense	41,254	43,157	78,254	75,715
Total non-interest expense	344,089	358,227	676,556	718,012
Income before income taxes	297,616	237,123	584,449	186,776
Income tax expense	62,648	54,812	128,477	21,212
Net income	234,968	182,311	455,972	165,564
Less: Preferred stock dividends	4,162	4,163	8,325	7,594
Net income available to common stockholders	230,806	178,148	447,647	157,970
Earnings applicable to common stockholders	$ 230,806	$ 178,148	$ 447,647	$ 157,970
Earnings per common share:
Basic (in dollars per share)	$ 1.32	$ 1.00	$ 2.57	$ 0.97
Diluted (in dollars per share)	$ 1.32	$ 1.00	$ 2.57	$ 0.97