Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
INTEREST INCOME
Loans	$ 163,180	$ 179,971	$ 527,656	$ 517,533
Interest bearing balances due from banks and federal funds sold	623	1,586	3,667	4,861
Investment securities	14,910	14,467	47,326	46,414
Mortgage loans held for sale	1,012	382	1,961	924
TOTAL INTEREST INCOME	179,725	196,406	580,610	569,732
INTEREST EXPENSE
Deposits	16,206	36,936	65,489	102,482
Federal funds purchased and securities sold under agreements to repurchase	335	249	1,431	642
Other borrowings	4,943	5,381	14,783	18,393
Subordinated notes and debentures	4,631	4,576	14,133	13,528
TOTAL INTEREST EXPENSE	26,115	47,142	95,836	135,045
NET INTEREST INCOME	153,610	149,264	484,774	434,687
Provision for credit loss expense	22,981	21,973	68,030	38,337
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES	130,629	127,291	416,744	396,350
NON-INTEREST INCOME
Investment banking income	557	513	2,005	1,491
Bank owned life insurance income	1,591	1,302	4,334	3,357
Gain on sale of securities, net	22,305	7,374	54,790	12,937
Other income	5,380	44,721	27,990	54,942
TOTAL NON-INTEREST INCOME	71,851	84,675	204,472	159,401
NON-INTEREST EXPENSE
Salaries and employee benefits	61,144	52,065	186,712	164,560
Occupancy expense, net	9,647	8,342	28,374	22,736
Furniture and equipment expense	6,231	4,898	18,098	12,462
Other real estate and foreclosure expense	602	1,125	1,201	2,353
Deposit insurance	2,244	0	7,557	4,550
Merger related costs	902	2,556	3,800	11,548
Other operating expenses	38,179	37,879	119,618	100,808
TOTAL NON-INTEREST EXPENSE	118,949	106,865	365,360	319,017
INCOME BEFORE INCOME TAXES	83,531	105,101	255,856	236,734
Provision for income taxes	17,633	23,275	53,920	51,289
NET INCOME	65,898	81,826	201,936	185,445
Preferred stock dividends	13	0	39	326
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 65,885	$ 81,826	$ 201,897	$ 185,119
BASIC EARNINGS PER SHARE (in dollars per share)	$ 0.60	$ 0.85	$ 1.83	$ 1.95
DILUTED EARNINGS PER SHARE (in dollars per share)	$ 0.60	$ 0.84	$ 1.83	$ 1.94
Trust income
NON-INTEREST INCOME
Non-interest income	$ 6,744	$ 6,108	$ 21,148	$ 17,610
Service charges on deposit accounts
NON-INTEREST INCOME
Non-interest income	10,385	10,825	32,283	31,450
Other service charges and fees
NON-INTEREST INCOME
Non-interest income	1,764	1,308	4,841	3,909
Mortgage lending income
NON-INTEREST INCOME
Non-interest income	13,971	4,509	31,476	10,988
SBA lending income
NON-INTEREST INCOME
Non-interest income	304	956	845	2,348
Debit and credit card fees
NON-INTEREST INCOME
Non-interest income	$ 8,850	$ 7,059	$ 24,760	$ 20,369