LOANS AND ALLOWANCE FOR CREDIT LOSSES (Schedule of Loan Receivables) (Details) - USD ($)	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Loans and Leases Receivable Disclosure [Line Items]
Total loans	$ 5,165,089,000		$ 4,853,495,000
Deferred fees, net of origination costs	(15,543,000)		(12,972,000)
Loans, net of deferred fees and costs	5,149,546,000		4,840,523,000
Allowance for credit losses	(51,650,000)	$ (47,752,000)	(44,876,000)	$ (40,534,000)	$ (38,134,000)	$ (34,729,000)
Net loans	5,097,896,000		4,795,647,000
Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Securities pledged	3,400,000,000		2,400,000,000
Real estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans	4,190,297,000		3,919,948,000
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Total loans	954,700,000		908,616,000
Allowance for credit losses	(10,977,000)	(10,757,000)	(10,274,000)	(9,144,000)	(8,488,000)	(7,708,000)
Commercial and industrial | Paycheck Protection Program loans
Loans and Leases Receivable Disclosure [Line Items]
Net loans	77,000		97,000
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans	20,092,000		24,931,000
Allowance for credit losses	(547,000)	(620,000)	(195,000)	(217,000)	(237,000)	(404,000)
Commercial | Real estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans	3,546,818,000		3,254,508,000
Allowance for credit losses	(34,621,000)	(31,836,000)	(29,496,000)	(25,945,000)	(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	131,370,000		143,693,000
Allowance for credit losses	(1,600,000)	(1,261,000)	(1,983,000)	(2,587,000)	(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	460,285,000		468,540,000
Allowance for credit losses	(3,543,000)	(2,871,000)	(2,823,000)	(2,539,000)	(2,256,000)	(2,156,000)
One to four family | Real estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans	51,824,000		53,207,000
Allowance for credit losses	$ (362,000)	$ (407,000)	$ (105,000)	$ (102,000)	$ (104,000)	$ (140,000)