CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income	$ 213,141	$ 236,222
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	33,185	27,681
Stock-based compensation	13,420	10,690
Provision for credit losses	47,555	17,403
Net amortization of premiums and accretion of discounts on securities and borrowings	9,680	14,112
Amortization of other intangible assets	15,837	11,455
Losses (gains) on securities transactions, net	1,381	(476)
Proceeds from sales of loans held for sale	331,298	690,844
Gains on sales of loans, net	(4,588)	(13,574)
Originations of loans held for sale	(210,048)	(541,627)
Losses (gains) on sales of assets, net	265	(36)
Loss on extinguishment of debt	0	8,406
Net change in:
Fair value of borrowings hedged by derivative transactions	(20,194)	0
Trading debt securities	38,130	(21,216)
Cash surrender value of bank owned life insurance	(4,159)	(4,806)
Accrued interest receivable	(12,083)	7,162
Other assets	(205,964)	131,345
Accrued expenses and other liabilities	558,675	(119,331)
Net cash provided by operating activities	805,531	454,254
Cash flows from investing activities:
Net loan originations and purchases	(3,495,486)	(264,512)
Equity securities:
Purchases	(1,538)	(2,482)
Sales	1,110	649
Held to maturity debt securities:
Purchases	(545,934)	(744,868)
Maturities, calls and principal repayments	294,052	372,397
Available for sale debt securities:
Purchases	(38,000)	(87,366)
Sales	12,846	41,134
Maturities, calls and principal repayments	150,262	287,901
Death benefit proceeds from bank owned life insurance	3,089	3,850
Proceeds from sales of real estate property and equipment	7,265	2,747
Proceeds from sales of loans held for investment	0	4,498
Purchases of real estate property and equipment	(35,164)	(12,207)
Cash and cash equivalent acquired in acquisitions, net	321,540	0
Net cash used in investing activities	(3,325,958)	(398,259)
Cash flows from financing activities:
Net change in deposits	1,218,642	1,259,172
Net change in short-term borrowings	763,284	(293,580)
Proceeds from issuance of long-term borrowings, net	0	295,934
Repayments of long-term borrowings	0	(710,595)
Cash dividends paid to preferred shareholders	(6,344)	(6,344)
Cash dividends paid to common shareholders	(92,618)	(90,201)
Purchase of common shares to treasury	(23,886)	(684)
Common stock issued, net	106	6,194
Other, net	(365)	(333)
Net cash provided by financing activities	1,858,819	459,563
Net change in cash and cash equivalents	(661,608)	515,558
Cash and cash equivalents at beginning of year	2,049,920	1,329,205
Cash and cash equivalents at end of period	1,388,312	1,844,763
Supplemental disclosures of cash flow information:
Interest on deposits and borrowings	57,151	82,596
Federal and state income taxes	77,285	117,562
Supplemental schedule of non-cash investing activities:
Transfer of loans to other real estate owned	0	141
Lease right of use assets obtained in exchange for operating lease liabilities	24,745	1,993
Non-cash assets acquired:
Equity securities	6,239	0
Investment securities available for sale	505,928	0
Investment securities held to maturity	806,627	0
Premises and equipment, net	5,844,070	0
Premises and equipment, net	38,827	0
Lease right of use assets	49,434	0
Bank owned life insurance	126,861	0
Accrued interest receivable	25,717	0
Goodwill	407,522	0
Other intangible assets, net	159,587	0
Other assets	158,352	0
Non-cash net assets acquired	8,129,164	0
Liabilities assumed:
Deposits	7,029,997	0
Short-term borrowings	103,794	0
Lease liabilities	79,844	0
Accrued expenses and other liabilities	119,240	0
Total liabilities assumed	7,332,875	0
Non-cash net assets acquired	796,289	0
Net cash and cash equivalents acquired in acquisition	321,540	0
Common stock issued in acquisition	$ 1,117,829	$ 0