LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of Past Due Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 19,234	$ 30,294
Loans not Past Due	3,223,879	3,112,025
Total loans	3,243,113	3,142,319
30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	7,349	7,489
60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,421	16,416
Greater than 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	5,464	6,389
Real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	2,614,105	2,504,388
Real estate | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,360	10,024
Loans not Past Due	1,977,858	1,877,481
Total loans	1,981,218	1,887,505
Real estate | Commercial | 30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,360	40
Real estate | Commercial | 60 - 89 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	121,122	112,290
Total loans	121,122	112,290
Real estate | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans not Past Due	445,284	433,239
Total loans	445,284	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	66,481	68,446
Total loans	66,481	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	13,678	15,021
Loans not Past Due	573,414	576,479
Total loans	587,092	591,500
Commercial and industrial | 30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,941	4,429
Commercial and industrial | 60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,400	6,400
Commercial and industrial | Greater than 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,337	4,192
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,196	2,341
Loans not Past Due	39,720	44,090
Total loans	41,916	46,431
Consumer | 30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	48	112
Consumer | 60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	21	32
Consumer | Greater than 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 2,127	$ 2,197