CONSOLIDATED STATEMENTS OF INCOME (unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Interest income:
Loans, including fees		$ 401,997	$ 457,564	$ 829,334	$ 905,333
Investment securities available for sale		44,935	52,794	96,588	102,732
Loans held for sale		1,914	752	2,706	1,165
Federal Reserve Bank balances		394	2,701	1,902	6,371
Other earning assets		2,329	2,320	4,936	5,369
Total interest income		451,569	516,131	935,466	1,020,970
Interest expense:
Deposits		56,474	92,700	142,476	180,383
Federal funds purchased, securities sold under repurchase agreements, and other short-term borrowings		1,778	7,294	7,710	10,757
Long-term debt		16,751	18,875	35,454	35,392
Total interest expense		75,003	118,869	185,640	226,532
Net interest income		376,566	397,262	749,826	794,438
Provision for credit losses	[1]	141,851	12,119	300,573	35,688
Net interest income after provision for credit losses		234,715	385,143	449,253	758,750
Non-interest revenue:
Service charges on deposit accounts		15,567	21,994	36,255	42,853
Fiduciary and asset management fees		14,950	14,478	30,124	28,057
Card fees		9,186	11,161	20,136	22,037
Brokerage revenue		9,984	10,052	22,383	19,431
Mortgage banking income		23,530	7,907	35,757	12,962
Capital markets income		6,050	8,916	17,294	14,161
Income from bank-owned life insurance		7,756	5,176	13,794	10,466
Investment securities gains (losses), net		69,409	(1,845)	78,144	(1,771)
Other non-interest revenue		17,052	11,968	23,454	20,989
Total non-interest revenue		173,484	89,807	277,341	169,185
Non-interest expense:
Salaries and other personnel expense		159,597	143,009	309,274	282,436
Net occupancy, equipment, and software expense		41,727	39,851	83,921	78,245
Third-party processing and other services		21,366	19,118	42,846	36,875
Professional fees		15,305	9,312	25,980	15,660
FDIC insurance and other regulatory fees		6,851	7,867	12,129	14,629
Merger-related expense		0	7,401	0	57,140
Other operating expenses		39,295	37,568	86,271	71,552
Total non-interest expense		284,141	264,126	560,421	556,537
Income before income taxes		124,058	210,824	166,173	371,398
Income tax expense		30,866	54,640	34,461	95,028
Net income		93,192	156,184	131,712	276,370
Less: Preferred stock dividends		8,291	3,150	16,581	6,300
Net income available to common shareholders		$ 84,901	$ 153,034	$ 115,131	$ 270,070
Net income per common share, basic (in dollars per share)		$ 0.58	$ 0.97	$ 0.78	$ 1.70
Net income per common share, diluted (in dollars per share)		$ 0.57	$ 0.96	$ 0.78	$ 1.68
Weighted average common shares outstanding, basic (in shares)		147,288	157,389	147,300	159,148
Weighted average common shares outstanding, diluted (in shares)		147,733	159,077	148,067	160,908

[1] Beginning January 1, 2020, provision calculation is based on current expected credit loss methodology. Prior to January 1, 2020, calculation was based on incurred loss methodology.