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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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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Nominal or face amount used to calculate payment on derivative.

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