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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Cumulative Basis Adjustment for Fair Value Hedges (Detail) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
AFS debt securities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amortized Cost	$ 0	$ 10,000
Cumulative Amount of Fair Value Hedging Adjustment to Hedged Items	0	0
Deposits
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amortized Cost	1,715,082	1,794,923
Cumulative Amount of Fair Value Hedging Adjustment to Hedged Items	21,870	(6,042)
FHLB advances
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amortized Cost	850,000	1,200,000
Cumulative Amount of Fair Value Hedging Adjustment to Hedged Items	$ 5,377	$ (1,648)

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Amount of asset hedged in fair value hedging relationship.

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Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk. Excludes cumulative basis adjustment related to foreign exchange risk.

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