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DERIVATIVES - Summary of Derivative Financial Instruments and Balances (Detail) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | $ 7,586,618 | $ 2,719,980
Derivative Asset | 112,607 | 29,189
Estimate Fair Value Loss | (112,616) | (29,188)
Fair Value Hedges | Matched interest rate swaps | Accrued interest and other liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | 1,923,375 | 1,359,990
Derivative Asset | 2,636 | 11,787
Estimate Fair Value Loss | (70,808) | (17,401)
Fair Value Hedges | Matched interest rate swaps | Accrued interest and other assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | 1,923,375 | 1,359,990
Derivative Asset | 70,799 | 17,402
Estimate Fair Value Loss | (2,636) | (11,787)
Foreign Exchange [Member] | Matched interest rate swaps | Accrued interest and other liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | 1,869,934 | 0
Derivative Asset | 10,433 | 0
Estimate Fair Value Loss | (28,739) | 0
Foreign Exchange [Member] | Matched interest rate swaps | Accrued interest and other assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | 1,869,934 | 0
Derivative Asset | 28,739 | 0
Estimate Fair Value Loss | $ (10,433) | $ 0

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