CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
INTEREST INCOME
Loans	$ 85,625	$ 84,173	$ 63,554	$ 169,798	$ 105,990
Investment securities and other interest-earning assets	7,074	6,654	5,179	13,728	8,170
Total interest income	92,699	90,827	68,733	183,526	114,160
INTEREST EXPENSE
Deposits	7,756	5,914	3,081	13,670	5,216
FHLB advances and other borrowings	2,125	2,023	1,175	4,148	1,779
Subordinated debentures	1,647	1,609	1,139	3,256	2,124
Total interest expense	11,528	9,546	5,395	21,074	9,119
Net interest income before provision for credit losses	81,171	81,281	63,338	162,452	105,041
Provision for credit losses	1,761	2,253	1,945	4,014	4,190
Net interest income after provision for credit losses	79,410	79,028	61,393	158,438	100,851
NONINTEREST INCOME
Loan servicing fees	292	345	143	637	365
Earnings on bank-owned life insurance	617	611	689	1,228	1,025
Net gain from sales of loans	3,843	2,958	2,887	6,801	5,698
Net gain from sales of investment securities	330	6	2,093	336	2,093
Other income	753	1,414	907	2,167	1,434
Total noninterest income	8,151	7,666	8,759	15,817	13,442
NONINTEREST EXPENSE
Compensation and benefits	29,274	28,873	21,623	58,147	36,510
Premises and occupancy	5,045	4,781	3,733	9,826	6,186
Data processing	2,747	2,702	2,439	5,449	3,626
Other real estate owned operations, net	2	1	44	3	56
FDIC insurance premiums	581	611	818	1,192	1,273
Legal, audit and professional expense	1,816	1,839	1,178	3,655	2,035
Marketing expense	1,352	1,530	1,006	2,882	1,824
Office, telecommunications and postage expense	1,115	1,080	922	2,195	1,355
Loan expense	594	591	1,068	1,185	1,536
Deposit expense	2,302	1,676	1,669	3,978	3,113
Merger-related expense	943	936	10,117	1,879	15,063
CDI amortization	1,996	2,274	1,761	4,270	2,272
Other expense	2,309	2,914	2,077	5,223	3,610
Total noninterest expense	50,076	49,808	48,455	99,884	78,459
Net income before income taxes	37,485	36,886	21,697	74,371	35,834
Income tax	10,182	8,884	7,521	19,066	12,137
Net Income	$ 27,303	$ 28,002	$ 14,176	$ 55,305	$ 23,697
EARNINGS PER SHARE
Basic (in dollars per share)	$ 0.59	$ 0.61	$ 0.36	$ 1.20	$ 0.71
Diluted (in dollars per share)	$ 0.58	$ 0.60	$ 0.35	$ 1.18	$ 0.69
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	46,053,077	45,893,496	39,586,524	45,973,727	33,591,040
Diluted (in shares)	46,702,968	46,652,059	40,267,220	46,678,123	34,267,215
Service charges on deposit accounts
NONINTEREST INCOME
Noninterest income	$ 1,057	$ 1,150	$ 866	$ 2,207	$ 1,207
Other service fee income
NONINTEREST INCOME
Noninterest income	169	146	495	315	874
Debit card interchange fee income
NONINTEREST INCOME
Noninterest income	$ 1,090	$ 1,036	$ 679	$ 2,126	$ 746