Consolidated Statements of Income - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
INTEREST INCOME
Loans		$ 150,253	$ 73,549	$ 293,603	$ 142,277
Interest bearing balances due from banks and federal funds sold		1,414	214	2,423	336
Investment securities		14,296	9,990	26,918	19,441
Mortgage loans held for sale		305	145	463	271
TOTAL INTEREST INCOME		166,268	83,898	323,407	162,325
INTEREST EXPENSE
Deposits		18,461	4,816	34,058	9,020
Federal funds purchased and securities sold under agreements to repurchase		88	92	198	167
Other borrowings		5,141	1,559	10,280	2,753
Subordinated notes and debentures		5,741	619	7,068	1,193
TOTAL INTEREST EXPENSE		29,431	7,086	51,604	13,133
NET INTEREST INCOME		136,837	76,812	271,803	149,192
Provision for loan losses		9,033	7,023	18,183	11,330
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES		127,804	69,789	253,620	137,862
NON-INTEREST INCOME
Investment banking income		814	637	1,648	1,327
Bank owned life insurance income		1,102	859	2,205	1,677
(Loss) gain on sale of securities, net		(7)	2,236	(1)	2,299
Other income		5,202	4,281	9,209	7,902
TOTAL NON-INTEREST INCOME		38,048	35,744	75,583	65,804
NON-INTEREST EXPENSE
Salaries and employee benefits		55,678	34,205	112,035	69,741
Occupancy expense, net		7,921	4,868	14,881	9,531
Furniture and equipment expense		4,020	4,550	8,423	8,993
Other real estate and foreclosure expense		1,382	517	2,402	1,106
Deposit insurance		1,856	780	3,984	1,460
Merger related costs		1,465	6,603	3,176	7,127
Other operating expenses		26,185	19,885	51,679	39,772
TOTAL NON-INTEREST EXPENSE		98,507	71,408	196,580	137,730
INCOME BEFORE INCOME TAXES		67,345	34,125	132,623	65,936
Provision for income taxes		13,783	11,060	27,749	20,751
NET INCOME		$ 53,562	$ 23,065	$ 104,874	$ 45,185
BASIC EARNING PER SHARE (in dollars per share)	[1]	$ 0.58	$ 0.36	$ 1.14	$ 0.72
DILUTED EARNING PER SHARE (in dollars per share)	[1]	$ 0.58	$ 0.36	$ 1.13	$ 0.71
Trust income
NON-INTEREST INCOME
Non-interest income		$ 5,622	$ 4,113	$ 10,871	$ 8,325
Service charges on deposit accounts
NON-INTEREST INCOME
Non-interest income		10,063	8,483	20,408	16,585
Other service charges and fees
NON-INTEREST INCOME
Non-interest income		2,017	2,515	4,767	4,712
Mortgage and SBA lending income
NON-INTEREST INCOME
Non-interest income		3,130	3,961	7,575	6,384
Debit and credit card fees
NON-INTEREST INCOME
Non-interest income		$ 10,105	$ 8,659	$ 18,901	$ 16,593

[1] All per share amounts have been restated to reflect the effect of the two-for-one stock split on February 8, 2018.