Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENT LIABILITIES - Commitments to Extend Credit (Details)

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COMMITMENTS AND CONTINGENT LIABILITIES - Commitments to Extend Credit (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Commercial    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Contract amount represents credit risk $ 11,052,384 $ 11,448,927
Consumer    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Contract amount represents credit risk 8,872,015 8,574,093
Commercial Real Estate    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Contract amount represents credit risk 888,967 813,271
Standby Letters of Credit    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Contract amount represents credit risk 509,910 511,706
Commercial letters-of-credit    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Contract amount represents credit risk $ 15,724 $ 56,119