DERIVATIVES AND HEDGING ACTIVITIES - Fair Value Hedges Narrative (Details) - Fair value hedges - Designated as Hedging Instrument - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
DERIVATIVES AND HEDGING ACTIVITIES
Clearing house related to the fair value derivatives	$ 2,000		$ 2,700
Interest Rate Swaps
DERIVATIVES AND HEDGING ACTIVITIES
Average fixed interest rate	4.82%
Mortgage loans - Amortized Cost	$ 685,400		692,200
Last-of-layer in the open hedge relationship	500,000		500,000
Basis adjustment associated with the hedge	1,900		$ 2,600
Interest income from swap transaction	$ 622	$ 628

Amount payable to other broker-dealer and clearing organization, including, but not limited to, security failed-to-receive, deposit received for security loaned, open transaction, and floor-brokerage payable.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Rule 15c3-1
-Number 240
-Section 15c3-1
-Publisher SEC

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 940
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
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Amount of asset hedged in portfolio layer hedging relationship, expected to be remaining at end of hedging relationship.

+ References

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-Topic 815
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Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk, in portfolio layer hedging relationship.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
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Amount of increase (decrease) in interest income for hedge basis adjustment from hedged layer exceeding outstanding amount of closed portfolio of financial asset or beneficial interest secured by financial instrument.

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-Topic 815
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