Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
INTEREST INCOME
Loans	$ 178,122	$ 150,253	$ 337,562	$ 293,603
Interest bearing balances due from banks and federal funds sold	1,121	1,414	3,275	2,423
Investment securities	16,594	14,296	33,906	26,918
Mortgage loans held for sale	332	305	542	463
TOTAL INTEREST INCOME	196,169	166,268	375,285	323,407
INTEREST EXPENSE
Deposits	34,796	18,461	65,546	34,058
Federal funds purchased and securities sold under agreements to repurchase	257	88	393	198
Other borrowings	6,219	5,141	13,012	10,280
Subordinated notes and debentures	4,541	5,741	8,952	7,068
TOTAL INTEREST EXPENSE	45,813	29,431	87,903	51,604
NET INTEREST INCOME	150,356	136,837	287,382	271,803
Provision for loan losses	7,079	9,033	16,364	18,183
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	143,277	127,804	271,018	253,620
NON-INTEREST INCOME
Investment banking income	360	814	978	1,648
Bank owned life insurance income	1,260	1,102	2,055	2,205
Gain (loss) on sale of securities, net	2,823	(7)	5,563	(1)
Other income	5,137	5,202	8,262	9,209
TOTAL NON-INTEREST INCOME	39,006	38,048	72,767	75,583
NON-INTEREST EXPENSE
Salaries and employee benefits	56,128	55,678	112,495	112,035
Occupancy expense, net	6,919	7,921	14,394	14,881
Furniture and equipment expense	4,206	4,020	7,564	8,423
Other real estate and foreclosure expense	591	1,382	1,228	2,402
Deposit insurance	2,510	1,856	4,550	3,984
Merger related costs	7,522	1,465	8,992	3,176
Other operating expenses	32,867	26,185	62,929	51,679
TOTAL NON-INTEREST EXPENSE	110,743	98,507	212,152	196,580
INCOME BEFORE INCOME TAXES	71,540	67,345	131,633	132,623
Provision for income taxes	15,616	13,783	28,014	27,749
NET INCOME	55,924	53,562	103,619	104,874
Preferred stock dividends	326	0	326	0
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 55,598	$ 53,562	$ 103,293	$ 104,874
BASIC EARNINGS PER SHARE (in dollars per share)	$ 0.58	$ 0.58	$ 1.10	$ 1.14
DILUTED EARNINGS PER SHARE (in dollars per share)	$ 0.58	$ 0.58	$ 1.09	$ 1.13
Trust income
NON-INTEREST INCOME
Non-interest income	$ 5,794	$ 5,622	$ 11,502	$ 10,871
Service charges on deposit accounts
NON-INTEREST INCOME
Non-interest income	10,557	10,063	20,625	20,408
Other service charges and fees
NON-INTEREST INCOME
Non-interest income	1,312	2,017	2,601	4,767
Mortgage lending income
NON-INTEREST INCOME
Non-interest income	3,656	2,780	6,479	6,252
SBA lending income
NON-INTEREST INCOME
Non-interest income	895	350	1,392	1,323
Debit and credit card fees
NON-INTEREST INCOME
Non-interest income	$ 7,212	$ 10,105	$ 13,310	$ 18,901