LOANS AND ALLOWANCE FOR CREDIT LOSSES (Schedule of Loan Receivables) (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Loans and Leases Receivable Disclosure [Line Items]
Total loans	$ 4,865,028,000	$ 4,853,495,000
Deferred fees, net of origination costs	(13,334,000)	(12,972,000)
Loans, net of deferred fees and costs	4,851,694,000	4,840,523,000
Allowance for credit losses	(47,752,000)	(44,876,000)	$ (38,134,000)	$ (34,729,000)
Net loans	4,803,942,000	4,795,647,000
Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Securities pledged	3,200,000,000	2,400,000,000
Real estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans	3,899,093,000	3,919,948,000
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Total loans	935,541,000	908,616,000
Allowance for credit losses	(10,757,000)	(10,274,000)	(8,488,000)	(7,708,000)
Commercial and industrial | Paycheck Protection Program loans
Loans and Leases Receivable Disclosure [Line Items]
Net loans	84,000	97,000
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans	30,394,000	24,931,000
Allowance for credit losses	(620,000)	(195,000)	(237,000)	(404,000)
Commercial | Real estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans	3,279,321,000	3,254,508,000
Allowance for credit losses	(31,836,000)	(29,496,000)	(24,720,000)	(22,216,000)
Commercial | Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Total loans		908,616,000
Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans		143,693,000
Construction | Real estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans	123,292,000	143,693,000
Allowance for credit losses	(1,261,000)	(1,983,000)	(2,329,000)	(2,105,000)
Multifamily
Loans and Leases Receivable Disclosure [Line Items]
Total loans		468,540,000
Multifamily | Real estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans	444,052,000	468,540,000
Allowance for credit losses	(2,871,000)	(2,823,000)	(2,256,000)	(2,156,000)
One to four family | Real estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans	52,428,000	53,207,000
Allowance for credit losses	$ (407,000)	$ (105,000)	$ (104,000)	$ (140,000)