LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of Past Due Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 17,652	$ 3,144
Loans not Past Due	2,977,145	2,674,775
Total loans	2,994,798	2,677,919
30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,340	982
60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,690	14
Greater than 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,623	2,148
Real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	2,415,316	2,157,344
Real estate | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans not Past Due	1,842,969	1,668,236
Total loans	1,842,969	1,668,236
Real estate | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans not Past Due	100,957	30,827
Total loans	100,957	30,827
Real estate | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans not Past Due	407,802	375,611
Total loans	407,802	375,611
Real estate | One to four family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	615
Loans not Past Due	62,973	82,670
Total loans	63,588	82,670
Real estate | One to four family | 30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	615
Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	14,819	1,801
Loans not Past Due	513,244	446,818
Total loans	528,063	448,619
Commercial and industrial | 30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,642	346
Commercial and industrial | 60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,665
Commercial and industrial | Greater than 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,512	1,455
Commercial and industrial | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	528,063	448,619
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,219	1,343
Loans not Past Due	49,200	70,613
Total loans	51,419	71,956
Consumer | 30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	83	636
Consumer | 60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	25	14
Consumer | Greater than 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,111	693
Consumer | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	$ 51,419	$ 71,956