CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income	$ 285,243	$ 271,689
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	43,975	38,329
Stock-based compensation	12,001	11,504
Provision for credit losses	106,747	18,800
Net amortization of premiums and accretion of discounts on securities and borrowings	26,051	21,584
Amortization of other intangible assets	18,528	13,175
Losses on securities transactions, net	127	114
Proceeds from sales of loans held for sale	716,739	341,503
Gains on sales of loans, net	(26,253)	(13,700)
Net impairment losses on securities recognized in earnings	0	2,928
Originations of loans held for sale	(829,252)	(338,996)
Gains on sales of assets, net	(716)	(76,997)
Net change in:
Cash surrender value of bank owned life insurance	(7,661)	(6,779)
Accrued interest receivable	(30,421)	(1,986)
Other assets	(420,572)	(264,228)
Accrued expenses and other liabilities	85,944	92,542
Net cash (used in) provided by operating activities	(19,520)	109,482
Cash flows from investing activities:
Net loan originations and purchases	(2,686,137)	(1,846,329)
Equity securities:
Purchases	(7,616)	0
Sales	27,867	0
Held to maturity debt securities:
Purchases	(381,606)	(317,794)
Maturities, calls and principal repayments	532,151	281,961
Available for sale debt securities:
Purchases	(306,071)	(19,892)
Maturities, calls and principal repayments	374,321	188,619
Death benefit proceeds from bank owned life insurance	14,062	6,354
Proceeds from sales of real estate property and equipment	16,136	107,132
Proceeds from sales of loans held for investment	30,020	302,951
Purchases of real estate property and equipment	(20,715)	(15,753)
Net cash used in investing activities	(2,407,588)	(1,312,751)
Cash flows from financing activities:
Net change in deposits	2,002,145	1,093,148
Net change in short-term borrowings	337,446	(293,497)
Proceeds from issuance of long-term borrowings, net	838,388	850,000
Repayments of long-term borrowings	(108,446)	(255,000)
Cash dividends paid to preferred shareholders	(9,516)	(9,516)
Cash dividends paid to common shareholders	(133,536)	(110,037)
Purchase of common shares to treasury	(4,972)	(1,505)
Common stock issued, net	2,074	(351)
Other, net	(451)	(365)
Net cash provided by financing activities	2,923,132	1,272,877
Net change in cash and cash equivalents	496,024	69,608
Cash and cash equivalents at beginning of year	434,687	428,629
Cash and cash equivalents at end of period	930,711	498,237
Cash payments for:
Interest on deposits and borrowings	229,987	312,663
Federal and state income taxes	108,302	106,296
Supplemental schedule of non-cash investing activities:
Transfer of loans to other real estate owned	3,716	1,453
Transfer of loans to loans held for sale	30,020	302,951
Lease right of use assets obtained in exchange for operating lease liabilities	$ 10,141	$ 306,471