CONSOLIDATED STATEMENTS OF INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
INTEREST INCOME:
Loans, including fees	$ 154,266	$ 149,422	$ 104,205
Securities	15,294	4,209	3,604
Other investments	847	761	453
Deposits in financial institutions and fed funds sold	1,843	1,152	292
Total interest income	172,250	155,544	108,554
INTEREST EXPENSE:
Transaction and savings deposits	9,298	5,749	3,103
Certificates and other time deposits	15,452	14,022	7,237
Subordinated debentures and subordinated notes	4,216	1,182	227
Other borrowed funds	2,237	963	379
Total interest expense	31,203	21,916	10,946
NET INTEREST INCOME	141,047	133,628	97,608
PROVISION FOR LOAN LOSSES	14,360	64,700	17,864
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	126,687	68,928	79,744
NONINTEREST INCOME:
Customer service fees	9,103	6,129	3,925
Loan fees	3,515	2,974	2,369
(Loss) gain on sale of available-for-sale securities, net	(38)	0	772
(Loss) gain on held-for-sale loans, net	(2,308)	(1,404)	405
Gain on sale of guaranteed portion of loans, net	5,755	3,343	3,484
Other	2,485	3,154	1,232
Total noninterest income	18,512	14,196	12,187
NONINTEREST EXPENSE:
Salaries and employee benefits	52,542	47,169	38,110
Occupancy	8,194	8,319	7,097
Professional and regulatory fees	8,868	8,958	8,923
Data processing	3,808	3,859	3,098
Software license and maintenance	2,027	2,155	1,844
Marketing	775	1,114	791
Loan related	1,804	3,795	1,185
Real estate acquired by foreclosure, net	704	3,168	1,086
Other	5,377	5,961	4,044
Total noninterest expense	84,099	84,498	66,178
INCOME (LOSS) BEFORE INCOME TAXES	61,100	(1,374)	25,753
PROVISION (BENEFIT) FOR INCOME TAXES	26,964	(402)	10,314
NET INCOME (LOSS)	$ 34,136	$ (972)	$ 15,439
EARNINGS (LOSSES) PER SHARE:
Basic (in dollars per share)	$ 0.92	$ (0.03)	$ 0.54
Diluted (in dollars per share)	$ 0.92	$ (0.03)	$ 0.53