CONSOLIDATED STATEMENTS OF INCOME - 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
Interest and fees on loans and leases	$ 557,195	$ 356,371	$ 1,189,707	$ 1,040,421
Interest and fees on loans held for sale	8,284	6,069	21,779	24,074
Taxable	24,113	28,418	75,846	90,935
Tax-exempt	1,421	352	2,421	925
Interest on trading securities	6,177	10,512	28,017	37,214
Interest on other earning assets	1,021	5,772	5,433	26,629
Total interest income	598,211	407,494	1,323,203	1,220,198
Interest expense
Interest on deposits	42,293	78,591	121,527	239,803
Interest on trading liabilities	699	2,943	4,965	9,515
Interest on short-term borrowings	1,259	11,532	12,578	29,314
Interest on term borrowings	21,595	13,752	43,622	42,772
Total interest expense	65,846	106,818	182,692	321,404
Net interest income	532,365	300,676	1,140,511	898,794
Provision for credit losses	227,000	14,366	502,388	36,273
Net interest income after provision for credit losses	305,365	286,310	638,123	862,521
Noninterest income
Fixed income	110,943	77,645	318,999	197,808
Deposit transactions and cash management	42,056	34,379	103,133	98,374
Mortgage banking and title income	65,503	2,019	72,072	6,477
Brokerage, management fees and commissions	17,891	14,157	47,096	40,910
Trust services and investment management	11,741	7,163	26,669	22,077
Bankcard income	10,457	7,017	24,362	20,324
Securities gains (losses), net	(1,170)	97	(2,638)	177
Purchase accounting gain	532,150	0	532,150	0
Other income	33,352	29,258	82,105	84,626
Total noninterest income	822,923	171,735	1,203,948	470,773
Noninterest expense
Personnel expense	329,439	167,022	713,168	516,590
Net occupancy expense	39,098	18,887	80,106	60,299
Legal and professional fees	43,236	19,764	64,863	52,671
Computer software	25,512	15,191	58,061	45,331
Operations services	15,634	11,634	38,980	34,835
Contributions	39,339	167	39,811	408
Equipment expense	12,022	8,197	28,958	25,401
Amortization of intangible assets	14,629	6,206	25,221	18,628
Other expense	68,131	61,238	160,971	150,720
Total noninterest expense	587,040	308,306	1,210,139	904,883
Income before income taxes	541,248	149,739	631,932	428,411
Provision for income taxes	2,210	35,796	19,757	97,321
Net income	539,038	113,943	612,175	331,090
Net income attributable to noncontrolling interest	2,977	2,883	8,680	8,555
Net income attributable to controlling interest	536,061	111,060	603,495	322,535
Preferred stock dividends	12,722	1,550	15,822	4,650
Net income available to common shareholders	$ 523,339	$ 109,510	$ 587,673	$ 317,885
Basic earnings per share (in dollars per share)	$ 0.95	$ 0.35	$ 1.50	$ 1.01
Diluted earnings per share (in dollars per share)	$ 0.95	$ 0.35	$ 1.50	$ 1.00
Weighted average common shares (in shares)	549,690	311,888	391,699	314,442
Diluted average common shares (in shares)	550,846	313,805	392,713	316,401