CONSOLIDATED STATEMENTS OF INCOME (unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest income:
Loans, including fees		$ 384,275	$ 463,437	$ 1,213,609	$ 1,368,769
Investment securities available for sale		43,196	53,761	139,784	156,493
Interest and Fee Income, Loans and Leases Held-for-sale		6,341	978	9,047	2,144
Federal Reserve Bank balances		285	2,288	2,187	8,659
Other earning assets		1,453	2,951	6,389	8,320
Total interest income		435,550	523,415	1,371,016	1,544,385
Interest expense:
Deposits		43,194	94,082	185,670	274,466
Federal funds purchased, securities sold under repurchase agreements, and other short-term borrowings		176	7,843	7,885	18,599
Long-term debt		15,190	19,393	50,645	54,785
Total interest expense		58,560	121,318	244,200	347,850
Net interest income		376,990	402,097	1,126,816	1,196,535
Provision for credit losses	[1]	43,383	27,562	343,956	63,250
Net interest income after provision for credit losses		333,607	374,535	782,860	1,133,285
Non-interest revenue:
Service charges on deposit accounts		17,813	22,952	54,069	65,805
Fiduciary and asset management fees		15,885	14,686	46,009	42,743
Card fees		10,823	12,297	30,959	34,334
Brokerage revenue		10,604	11,071	32,987	30,502
Mortgage banking income		31,229	10,351	66,987	23,313
Capital markets income		5,690	7,396	22,984	21,557
Income from bank-owned life insurance		7,778	5,139	21,572	15,605
Investment securities (losses) gains, net		(1,550)	(3,731)	76,594	(5,502)
Other non-interest revenue		16,139	8,599	39,591	29,588
Total non-interest revenue		114,411	88,760	391,752	257,945
Non-interest expense:
Salaries and other personnel expense		154,994	142,516	464,268	424,952
Net occupancy, equipment, and software expense		41,554	41,017	125,475	119,262
Third-party processing and other services		20,620	18,528	63,466	55,403
Professional fees		13,377	9,719	39,358	25,379
FDIC insurance and other regulatory fees		6,793	7,242	18,922	21,872
Goodwill impairment		44,877	0	44,877	0
Merger-related expense		0	353	0	57,493
Other operating expenses		34,440	56,935	120,710	128,486
Total non-interest expense		316,655	276,310	877,076	832,847
Income before income taxes		131,363	186,985	297,536	558,383
Income tax expense		39,789	51,259	74,250	146,287
Net income		91,574	135,726	223,286	412,096
Less: Preferred stock dividends		8,291	8,291	24,872	14,591
Net income available to common shareholders		$ 83,283	$ 127,435	$ 198,414	$ 397,505
Net income per common share, basic (in dollars per share)		$ 0.57	$ 0.84	$ 1.35	$ 2.53
Net income per common share, diluted (in dollars per share)		$ 0.56	$ 0.83	$ 1.34	$ 2.51
Weighted average common shares outstanding, basic (in shares)		147,314	152,238	147,304	156,819
Weighted average common shares outstanding, diluted (in shares)		147,976	154,043	148,037	158,595

[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.