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DERIVATIVES - Additional Information (Details) - USD ($)	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2023	Sep. 30, 2022	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Derivative [Line Items]
Net interest income (expense)	$ 38,921,000		$ 42,893,000	$ 82,899,000	$ 82,515,000
Swap valuation allowance					673,000
Accrued interest receivable	20,865,000			20,865,000		$ 25,157,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional amount	310,000,000.0			310,000,000.0		290,000,000.0
Unrealized after-tax gain of accumulated other comprehensive income (loss)		$ 167,000
Unrealized gain				11,248,000		3,290,000
Net interest income (expense)	1,100,000		$ (679,000)	2,000,000.0	$ (1,700,000)
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivative [Line Items]
Notional amount	310,000,000			310,000,000		290,000,000
Loan Level Swaps [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional amount	585,234,000			585,234,000		612,211,000
Loan Level Swaps [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivative [Line Items]
Accrued interest payable	$ 368,000			$ 368,000		$ 1,100,000

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