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DERIVATIVES - Additional Information (Detail)
$ in Thousands
Dec. 31, 2019
USD ($)
entity
Dec. 31, 2018
USD ($)
entity
Derivative [Line Items]    
Number of counterparties | entity 18 13
Derivative Asset $ 112,607 $ 29,189
Derivative Assets (Liabilities), at Fair Value, Net (9)  
Derivative Liability 112,616 29,188
Derivative, Notional Amount $ 7,586,618 2,719,980
Foreign Exchange [Member]    
Derivative [Line Items]    
Number of counterparties | entity 6  
Credit Risk Contract [Member]    
Derivative [Line Items]    
Outstanding liability from counterparty contracts $ 200 100
Derivative, Notional Amount 216,200 138,400
Interest Rate Lock Commitments [Member]    
Derivative [Line Items]    
Derivative, Notional Amount 33,400 20,800
Other Credit Derivatives [Member]    
Derivative [Line Items]    
Outstanding liability from counterparty contracts   0
Derivative, Notional Amount 37,800 12,300
Credit Risk Derivative Assets, at Fair Value 900  
Derivative [Member] | Other Liabilities [Member]    
Derivative [Line Items]    
Derivative Liability 67,500 4,900
Derivative, Notional Amount 1,900,000 $ 1,400,000
Derivative [Member] | Other Liabilities [Member] | Foreign Exchange [Member]    
Derivative [Line Items]    
Derivative Liability 18,300  
Derivative, Notional Amount $ 1,900,000