LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of Past Due Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 5,186	$ 3,086
Loans not Past Due	2,334,190	1,864,263
Total loans	2,339,376	1,867,349
30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,624	2,659
60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,450	138
Greater than 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,112	289
Real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,824,900	1,378,867
Real estate | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Loans not Past Due	1,359,997	949,778
Total loans	1,359,997	949,778
Real estate | Commercial | 30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	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	37,533	42,540
Total loans	37,533	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	351,599	307,126
Total loans	351,599	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	2,377	870
Loans not Past Due	73,394	78,553
Total loans	75,771	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	2,377	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	2,208	2,004
Loans not Past Due	424,441	379,688
Total loans	426,649	381,692
Commercial and industrial | 30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,336	1,670
Commercial and industrial | 60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	73	95
Commercial and industrial | Greater than 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	799	239
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	601	212
Loans not Past Due	87,226	106,578
Total loans	87,827	106,790
Consumer | 30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	288	119
Consumer | 60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	43
Consumer | Greater than 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 313	$ 50