Annual report pursuant to Section 13 and 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
Dec. 31, 2016
Dec. 31, 2015
Commercial    
Guarantor Obligations [Line Items]    
Contract amount represents credit risk $ 15,190,056 $ 11,448,927
Consumer    
Guarantor Obligations [Line Items]    
Contract amount represents credit risk 12,235,943 8,574,093
Commercial real estate    
Guarantor Obligations [Line Items]    
Contract amount represents credit risk 1,697,671 813,271
Standby letters of credit    
Guarantor Obligations [Line Items]    
Contract amount represents credit risk 637,182 511,706
Commercial letters-of-credit    
Guarantor Obligations [Line Items]    
Contract amount represents credit risk $ 4,610 $ 56,119