LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of Past Due Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 2,303	$ 3,086
Loans not Past Due	2,102,981	1,864,263
Total loans	2,105,284	1,867,349
30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	422	2,659
60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	383	138
Greater than 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,498	289
Real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,586,887	1,378,867
Real estate | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	96	0
Loans not Past Due	1,134,147	949,778
Total loans	1,134,243	949,778
Real estate | Commercial | 30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	96	0
Real estate | Commercial | 60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Real estate | Commercial | Greater than 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Real estate | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Loans not Past Due	46,245	42,540
Total loans	46,245	42,540
Real estate | Construction | 30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Real estate | Construction | 60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Real estate | Construction | Greater than 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Real estate | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Loans not Past Due	327,456	307,126
Total loans	327,456	307,126
Real estate | Multifamily | 30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Real estate | Multifamily | 60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Real estate | Multifamily | Greater than 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Real estate | One to four family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	870
Loans not Past Due	78,943	78,553
Total loans	78,943	79,423
Real estate | One to four family | 30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	870
Real estate | One to four family | 60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Real estate | One to four family | Greater than 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,203	2,004
Loans not Past Due	420,300	379,688
Total loans	421,503	381,692
Commercial and industrial | 30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	1,670
Commercial and industrial | 60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	159	95
Commercial and industrial | Greater than 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,044	239
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,004	212
Loans not Past Due	95,890	106,578
Total loans	96,894	106,790
Consumer | 30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	326	119
Consumer | 60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	224	43
Consumer | Greater than 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 454	$ 50