LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of Loans by Risk Category) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	$ 2,897,292	$ 2,677,919
Commercial Construction and Multifamily Real Estate Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	2,772,749	2,523,293
Commercial Construction and Multifamily Real Estate Loans [Member] | Pass
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	2,765,850	2,520,919
Commercial Construction and Multifamily Real Estate Loans [Member] | Special Mention
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	363	367
Commercial Construction and Multifamily Real Estate Loans [Member] | Substandard
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	5,489	960
Commercial Construction and Multifamily Real Estate Loans [Member] | Doubtful
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	1,047	1,047
Receivables other than one to four family and consumer loans
Loans and Leases Receivable Disclosure [Line Items]
Minimum threshold amount taken as base for credit indicator analysis	500
Real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	2,396,810	2,157,344
Real estate | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	1,875,764	1,668,236
Real estate | Commercial | Pass
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	1,875,401	1,667,869
Real estate | Commercial | Special Mention
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	363	367
Real estate | Construction
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	59,378	30,827
Real estate | Construction | Pass
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	59,378	30,827
Real estate | Multi-family
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	393,342	375,611
Real estate | Multi-family | Pass
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	393,342	375,611
Real estate | One to four family
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	68,326	82,670
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	444,265	448,619
Commercial and industrial | Pass
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	437,729	446,612
Commercial and industrial | Substandard
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	5,489	960
Commercial and industrial | Doubtful
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	1,047	1,047
Commercial and industrial | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	444,265	448,619
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	56,217	71,956
Consumer | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	$ 56,217	$ 71,956