PARENT COMPANY FINANCIAL INFORMATION (Condensed Statements of Income) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income:
Loan									$ 57,075	$ 42,360	$ 31,110
Securities and money market funds									315	142	110
Total interest income	$ 17,864	$ 16,401	$ 14,047	$ 12,441	$ 11,919	$ 11,337	$ 10,970	$ 9,929	60,753	44,155	32,682
Interest expense:
Trust preferred securities payable									636	539	456
Subordinated debt interest expense									1,322
Total interest expense	2,293	2,437	2,281	1,660	1,492	1,519	1,598	1,480	8,671	6,089	5,260
Net interest expense	15,571	13,964	11,766	10,781	10,427	9,818	9,372	8,449	52,082	38,066	27,422
Provision for loan losses	3,499	1,200	1,790	570	5,900	350	1,250	560	7,059	8,060	2,015
Net interest income after provision for loan losses	12,072	12,764	9,976	10,211	4,527	9,468	8,122	7,889	45,023	30,006	25,407
Other expense									2,821	2,300	2,631
Income before income tax expense	8,541	6,407	4,408	4,222	(384)	2,522	3,118	2,802	23,578	8,058	6,828
Income tax benefit	5,216	2,562	1,757	1,674	(433)	1,072	1,268	1,138	11,209	3,045	2,559
Net income per consolidated statements of income	$ 3,325	$ 3,845	$ 2,651	$ 2,548	$ 49	$ 1,450	$ 1,850	$ 1,664	12,369	5,013	4,269
Parent Company
Income:
Loan									17	6	0
Securities and money market funds									0	19	25
Total interest income									17	25	25
Interest expense:
Trust preferred securities payable									636	539	455
Subordinated debt interest expense									1,322	0	0
Total interest expense									1,958	539	455
Net interest expense									(1,941)	(514)	(430)
Provision for loan losses									0	4	0
Net interest income after provision for loan losses									(1,941)	(518)	(430)
Other expense									33	0	0
Loss before undistributed earnings of subsidiary bank									(1,974)	(518)	(430)
Equity in undistributed earnings of subsidiary bank									13,560	5,319	4,526
Income before income tax expense									11,586	4,801	4,096
Income tax benefit									(783)	(212)	(173)
Net income per consolidated statements of income									$ 12,369	$ 5,013	$ 4,269