CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Interest and fees on loans	$ 48,713	$ 40,403	$ 140,489	$ 110,503
Interest and dividends on securities	9,807	9,012	29,016	25,971
Interest on interest bearing deposits and other investments	634	664	1,835	1,778
TOTAL INTEREST INCOME	59,154	50,079	171,340	138,252
Interest on deposits	2,097	930	5,623	2,408
Interest on time certificates	2,975	1,266	7,783	2,646
Interest on borrowed money	2,520	2,134	6,403	5,128
TOTAL INTEREST EXPENSE	7,592	4,330	19,809	10,182
NET INTEREST INCOME	51,562	45,749	151,531	128,070
Provision for loan losses	5,774	680	9,388	3,385
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	45,788	45,069	142,143	124,685
Noninterest income
Other income	12,339	11,481	37,506	31,853
Securities losses, net	(48)	(47)	(198)	(26)
TOTAL NONINTEREST INCOME (Note H)	12,291	11,434	37,308	31,827
TOTAL NONINTEREST EXPENSES (Note H)	37,399	34,361	112,809	110,732
INCOME BEFORE INCOME TAXES	20,680	22,142	66,642	45,780
Provision for income taxes	4,358	7,926	15,329	15,962
NET INCOME	$ 16,322	$ 14,216	$ 51,313	$ 29,818
SHARE DATA
Net income per share - diluted (in dollars per share)	$ 0.34	$ 0.32	$ 1.07	$ 0.70
Net income per share - basic (in dollars per share)	0.35	0.33	1.09	0.72
Cash dividends declared (in dollars per share)	$ 0	$ 0	$ 0	$ 0
Average shares outstanding - diluted (in shares)	48,029,330	43,792,108	47,903,093	42,298,136
Average shares outstanding - basic (in shares)	47,205,383	43,151,248	47,108,302	41,626,356