CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Interest and fees on loans	$ 46,519	$ 38,209	$ 91,776	$ 70,100
Interest and dividends on securities	9,605	8,585	19,209	16,959
Interest on interest bearing deposits and other investments	585	604	1,201	1,114
TOTAL INTEREST INCOME	56,709	47,398	112,186	88,173
Interest on deposits	1,988	854	3,526	1,478
Interest on time certificates	2,629	814	4,808	1,380
Interest on borrowed money	1,885	1,574	3,883	2,994
TOTAL INTEREST EXPENSE	6,502	3,242	12,217	5,852
NET INTEREST INCOME	50,207	44,156	99,969	82,321
Provision for loan losses	2,529	1,401	3,614	2,705
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	47,678	42,755	96,355	79,616
Noninterest income
Other income	12,769	10,467	25,167	20,372
Securities (losses)/gains, net	(48)	21	(150)	21
TOTAL NONINTEREST INCOME (Note H)	12,721	10,488	25,017	20,393
TOTAL NONINTEREST EXPENSES (Note H)	38,246	41,625	75,410	76,371
INCOME BEFORE INCOME TAXES	22,153	11,618	45,962	23,638
Provision for income taxes	5,189	3,942	10,971	8,036
NET INCOME	$ 16,964	$ 7,676	$ 34,991	$ 15,602
SHARE DATA
Net income per share - diluted (in dollars per share)	$ 0.35	$ 0.18	$ 0.73	$ 0.38
Net income per share - basic (in dollars per share)	0.36	0.18	0.74	0.38
Cash dividends declared (in dollars per share)	$ 0	$ 0	$ 0	$ 0
Average shares outstanding - diluted (in shares)	47,974,118	43,556,285	47,827,646	41,538,769
Average shares outstanding - basic (in shares)	47,164,909	42,841,152	47,058,958	40,851,273