CONSOLIDATED STATEMENTS OF INCOME (unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Interest income:
Loans, including fees		$ 427,337	$ 447,769
Investment securities available for sale		51,653	49,938
Mortgage loans held for sale		792	391
Federal Reserve Bank balances		1,508	3,671
Other earning assets		2,607	3,070
Total interest income		483,897	504,839
Interest expense:
Deposits		86,002	87,684
Federal funds purchased, securities sold under repurchase agreements, and other short-term borrowings		5,932	3,463
Long-term debt		18,703	16,517
Total interest expense		110,637	107,664
Net interest income		373,260	397,175
Provision for credit losses	[1]	158,722	23,569
Net interest income after provision for credit losses		214,538	373,606
Non-interest revenue:
Service charges on deposit accounts		20,689	20,859
Fiduciary and asset management fees		15,174	13,578
Card fees		10,950	10,877
Brokerage revenue		12,398	9,379
Mortgage banking income		12,227	5,054
Capital markets income		11,243	5,245
Income from bank-owned life insurance		6,038	5,290
Investment securities gains, net		8,734	75
Other non-interest revenue		6,404	9,021
Total non-interest revenue		103,857	79,378
Non-interest expense:
Salaries and other personnel expense		149,678	139,427
Net occupancy and equipment expense		42,194	38,394
Third-party processing and other services		21,480	17,758
Professional fees		10,675	6,348
FDIC insurance and other regulatory fees		5,278	6,761
Advertising expense		4,752	5,123
Merger-related expense		0	49,738
Other operating expenses		42,222	28,861
Total non-interest expense		276,279	292,410
Income before income taxes		42,116	160,574
Income tax expense		3,595	40,388
Net income		38,521	120,186
Less: Preferred stock dividends		8,291	3,150
Net income available to common shareholders		$ 30,230	$ 117,036
Net income per common share, basic (in dollars per share)		$ 0.21	$ 0.73
Net income per common share, diluted (in dollars per share)		$ 0.20	$ 0.72
Weighted average common shares outstanding, basic (in shares)		147,311	160,927
Weighted average common shares outstanding, diluted (in shares)		148,401	162,760

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