LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of Loans by Risk Category) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	$ 2,770,799	$ 2,677,919
Commercial Construction and Multifamily Real Estate Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	2,632,077	2,523,293
Commercial Construction and Multifamily Real Estate Loans [Member] | Pass
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	2,625,708	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	4,959	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
Real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	2,225,500	2,157,344
Real estate | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	1,729,386	1,668,236
Real estate | Commercial | Pass
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	1,729,023	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	41,162	30,827
Real estate | Construction | Pass
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	41,162	30,827
Real estate | Multi-family
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	379,342	375,611
Real estate | Multi-family | Pass
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	379,342	375,611
Real estate | One to four family
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	75,610	82,670
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	482,187	448,619
Commercial and industrial | Pass
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	476,181	446,612
Commercial and industrial | Substandard
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	4,959	960
Commercial and industrial | Doubtful
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	1,047	1,047
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Gross	$ 63,112	$ 71,956