Consolidated Statements of Income - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
INTEREST INCOME
Loans		$ 162,438	$ 77,457	$ 456,041	$ 219,734
Interest bearing balances due from banks and federal funds sold		1,405	650	3,828	986
Investment securities		14,640	9,218	41,558	28,659
Mortgage loans held for sale		501	159	964	430
TOTAL INTEREST INCOME		178,984	87,484	502,391	249,809
INTEREST EXPENSE
Deposits		24,390	6,030	58,448	15,050
Federal funds purchased and securities sold under agreements to repurchase		104	83	302	250
Other borrowings		6,240	1,875	16,520	4,628
Subordinated notes and debentures		5,282	677	12,350	1,870
TOTAL INTEREST EXPENSE		36,016	8,665	87,620	21,798
NET INTEREST INCOME		142,968	78,819	414,771	228,011
Provision for loan losses		10,345	5,462	28,528	16,792
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES		132,623	73,357	386,243	211,219
NON-INTEREST INCOME
Investment banking income		664	680	2,312	2,007
Bank owned life insurance income		1,105	725	3,310	2,402
Gain on sale of securities, net		54	3	53	2,302
Other income		4,942	7,276	14,151	15,178
TOTAL NON-INTEREST INCOME		33,725	36,332	109,308	102,136
NON-INTEREST EXPENSE
Salaries and employee benefits		55,515	35,285	167,550	105,026
Occupancy expense, net		7,713	4,928	22,594	14,459
Furniture and equipment expense		3,761	4,840	12,184	13,833
Other real estate and foreclosure expense		538	1,071	2,940	2,177
Deposit insurance		2,248	1,020	6,232	2,480
Merger related costs		804	752	3,980	7,879
Other operating expenses		29,674	18,263	81,353	58,035
TOTAL NON-INTEREST EXPENSE		100,253	66,159	296,833	203,889
INCOME BEFORE INCOME TAXES		66,095	43,530	198,718	109,466
Provision for income taxes		10,902	14,678	38,651	35,429
NET INCOME		$ 55,193	$ 28,852	$ 160,067	$ 74,037
BASIC EARNINGS PER SHARE (in dollars per share)	[1]	$ 0.60	$ 0.45	$ 1.74	$ 1.16
DILUTED EARNINGS PER SHARE (in dollars per share)	[1]	$ 0.59	$ 0.44	$ 1.72	$ 1.16
Trust income
NON-INTEREST INCOME
Non-interest income		$ 6,277	$ 4,225	$ 17,148	$ 12,550
Service charges on deposit accounts
NON-INTEREST INCOME
Non-interest income		10,837	8,907	31,245	25,492
Other service charges and fees
NON-INTEREST INCOME
Non-interest income		1,201	2,433	5,968	7,145
Mortgage and SBA lending income
NON-INTEREST INCOME
Non-interest income		1,825	3,219	9,400	9,603
Debit and credit card fees
NON-INTEREST INCOME
Non-interest income		$ 6,820	$ 8,864	$ 25,721	$ 25,457

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