LOANS AND ALLOWANCE FOR CREDIT LOSSES (Schedule of Loan Receivables) (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Loans and Leases Receivable Disclosure [Line Items]
Total loans	$ 5,736,128,000	$ 5,642,012,000
Deferred fees, net of origination costs	(16,910,000)	(17,215,000)
Loans, net of deferred fees and costs	5,719,218,000	5,624,797,000
Allowance for credit losses	(58,538,000)	(57,965,000)	$ (47,752,000)	$ (44,876,000)
Net loans	5,660,680,000	5,566,832,000
loan encumbered	68,100,000	60,000,000.0
Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loan pledged	3,700,000,000	3,300,000,000
Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans	4,662,571,000	4,573,463,000
Commercial & industrial
Loans and Leases Receivable Disclosure [Line Items]
Total loans	1,057,488,000	1,051,463,000
Allowance for credit losses	(10,937,000)	(11,207,000)	(10,757,000)	(10,274,000)
loan encumbered	411,900,000	548,600,000
Commercial & industrial | Paycheck Protection Program loans
Loans and Leases Receivable Disclosure [Line Items]
Net loans	44,000	54,000
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans	16,069,000	17,086,000
Allowance for credit losses	(493,000)	(480,000)	(620,000)	(195,000)
Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans	3,951,071,000	3,857,711,000
Commercial | Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans	3,951,071,000	3,857,711,000
Allowance for credit losses	(36,704,000)	(35,635,000)	(31,836,000)	(29,496,000)
Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans	150,257,000	153,512,000
Construction | Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans	150,257,000	153,512,000
Allowance for credit losses	(1,712,000)	(1,765,000)	(1,261,000)	(1,983,000)
Multi-family
Loans and Leases Receivable Disclosure [Line Items]
Total loans	467,979,000	467,536,000
Multi-family | Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans	467,979,000	467,536,000
Allowance for credit losses	(8,171,000)	(8,215,000)	(2,871,000)	(2,823,000)
One-to-four-family
Loans and Leases Receivable Disclosure [Line Items]
Total loans	93,264,000	94,704,000
One-to-four-family | Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans	93,264,000	94,704,000
Allowance for credit losses	$ (521,000)	$ (663,000)	$ (407,000)	$ (105,000)