LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of Past Due Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 15,511	$ 30,294
Loans not Past Due	3,594,898	3,112,025
Total loans	3,610,409	3,142,319
30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	135	7,489
60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		16,416
Greater than 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	15,376	6,389
Real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	2,964,039	2,504,388
Real estate | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	9,984	10,024
Loans not Past Due	2,368,090	1,877,481
Total loans	2,378,074	1,887,505
Real estate | Commercial | 30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		40
Real estate | Commercial | 60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		9,984
Real estate | Commercial | Greater than 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	9,984
Real estate | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans not Past Due	150,144	112,290
Total loans	150,144	112,290
Real estate | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans not Past Due	374,555	433,239
Total loans	374,555	433,239
Real estate | One to four family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		2,908
Loans not Past Due	61,266	68,446
Total loans	61,266	71,354
Real estate | One to four family | 30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		2,908
Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,237	15,021
Loans not Past Due	608,066	576,479
Total loans	611,303	591,500
Commercial and industrial | 30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	92	4,429
Commercial and industrial | 60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		6,400
Commercial and industrial | Greater than 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,145	4,192
Consumer.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,290	2,341
Loans not Past Due	32,777	44,090
Total loans	35,067	46,431
Consumer. | 30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	43	112
Consumer. | 60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		32
Consumer. | Greater than 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 2,247	$ 2,197