PARENT COMPANY FINANCIAL INFORMATION (Condensed Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Assets
Cash and due from banks	$ 261,231	$ 82,931
Loans, net of allowance for loan losses	1,405,009	1,042,731
Total assets	1,759,855	1,220,301
Liabilities and Stockholders' Equity
Trust preferred securities payable	20,620	20,620
Subordinated debt payable, net of issuance costs	24,489
Other liabilities	8,882	6,864
Total liabilities	1,522,971	1,110,810
Stockholders' equity:
Common stock	81	45
Surplus	211,145	96,116
Retained earnings	25,861	13,492
Accumulated other comprehensive loss, net of tax	(206)	(165)
Total equity	236,884	109,491	$ 75,952	$ 58,743
Total liabilities and stockholders' equity	1,759,855	1,220,301
Parent Company
Assets
Cash and due from banks	6,761	818
Loans, net of allowance for loan losses	776	776
Investments	620	620
Investment in subsidiary bank, at equity	274,190	128,671
Other assets	596	11
Total assets	282,943	130,896
Liabilities and Stockholders' Equity
Trust preferred securities payable	20,620	20,620
Subordinated debt payable, net of issuance costs	24,489
Other liabilities	950	785
Total liabilities	46,059	21,405
Stockholders' equity:
Preferred stock	3	3
Common stock	81	45
Surplus	211,145	96,116
Retained earnings	25,861	13,492
Accumulated other comprehensive loss, net of tax	(206)	(165)
Total equity	236,884	109,491
Total liabilities and stockholders' equity	$ 282,943	$ 130,896