Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
INTEREST INCOME
Loans, including fees	$ 138,804	$ 176,910	$ 285,228	$ 364,476
Interest bearing balances due from banks and federal funds sold	651	603	1,449	3,044
Investment securities	27,128	13,473	48,701	32,416
Mortgage loans held for sale	386	668	1,025	949
TOTAL INTEREST INCOME	166,969	191,654	336,403	400,885
INTEREST EXPENSE
Deposits	10,782	18,006	23,961	49,283
Federal funds purchased and securities sold under agreements to repurchase	192	337	437	1,096
Other borrowings	4,897	4,963	9,699	9,840
Subordinated notes and debentures	4,565	4,667	9,092	9,502
TOTAL INTEREST EXPENSE	20,436	27,973	43,189	69,721
NET INTEREST INCOME	146,533	163,681	293,214	331,164
Provision for credit loss expense	(12,951)	21,915	(11,506)	45,049
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES	159,484	141,766	304,720	286,115
NON-INTEREST INCOME
Investment banking income	654	571	1,349	1,448
Bank owned life insurance income	2,038	1,445	3,561	2,743
Gain on sale of securities, net	5,127	390	10,598	32,485
Other income	8,110	9,809	18,370	22,610
TOTAL NON-INTEREST INCOME	47,924	48,806	98,264	129,851
NON-INTEREST EXPENSE
Salaries and employee benefits	60,261	57,644	120,601	125,568
Occupancy expense, net	9,103	9,217	18,403	18,727
Furniture and equipment expense	4,859	6,144	10,274	11,867
Other real estate and foreclosure expense	863	274	1,206	599
Deposit insurance	1,687	2,838	2,995	5,313
Merger related costs	686	1,830	919	2,898
Other operating expenses	38,007	38,230	74,861	78,669
TOTAL NON-INTEREST EXPENSE	115,466	116,177	229,259	243,641
INCOME BEFORE INCOME TAXES	91,942	74,395	173,725	172,325
Provision for income taxes	17,018	15,593	31,381	36,287
NET INCOME	74,924	58,802	142,344	136,038
Preferred stock dividends	13	13	26	26
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 74,911	$ 58,789	$ 142,318	$ 136,012
BASIC EARNINGS PER SHARE (in dollars per share)	$ 0.69	$ 0.54	$ 1.31	$ 1.23
DILUTED EARNINGS PER SHARE (in dollars per share)	$ 0.69	$ 0.54	$ 1.31	$ 1.22
Trust income
NON-INTEREST INCOME
Non-interest income	$ 7,238	$ 7,253	$ 13,904	$ 14,404
Service charges on deposit accounts
NON-INTEREST INCOME
Non-interest income	10,050	8,570	19,765	21,898
Other service charges and fees
NON-INTEREST INCOME
Non-interest income	2,048	1,489	3,970	3,077
Mortgage lending income
NON-INTEREST INCOME
Non-interest income	4,490	12,459	10,937	17,505
SBA lending income
NON-INTEREST INCOME
Non-interest income	287	245	527	541
Debit and credit card fees
NON-INTEREST INCOME
Non-interest income	$ 7,882	$ 6,575	$ 15,283	$ 13,140