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DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES - Narrative (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Securities available for sale, at estimated fair value	$ 1,299,014,000	$ 2,764,325,000
Cash collateral received from counterparties under master netting agreements	82,135,000	0
Cash collateral held by counterparties subject to master netting agreements		$ 12,800,000
Fair Value Hedging
Derivative [Line Items]
Securities available for sale, at estimated fair value	743,900,000
Interest Rate Swaps | Cash Flow Hedging
Derivative [Line Items]
Derivative, Notional Amount	$ 575,000,000

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- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.

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