Annual report pursuant to Section 13 and 15(d)

LOANS AND LEASES AND ALLOWANCE FOR CREDIT LOSSES - Narrative (Details)

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LOANS AND LEASES AND ALLOWANCE FOR CREDIT LOSSES - Narrative (Details)
 12 Months Ended
Dec. 31, 2016
USD ($)
securitization
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Aug. 16, 2016
USD ($)
Dec. 31, 2013
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Loans net premium $ 120,000,000 $ 262,000,000      
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]          
Future lease rental payments due 1,900,000,000        
Future lease rental payments due, in 2016 600,000,000        
Future lease rental payments due, in 2017 500,000,000        
Future lease rental payments due, in 2018 300,000,000        
Future lease rental payments due, in 2019 200,000,000        
Future lease rental payments due, in 2020 100,000,000        
Future lease rental payments due, after 2020 200,000,000        
Allowance for loan and lease losses 638,413,000 597,843,000 $ 605,196,000   $ 647,870,000
Interest income under original terms for NAL loans 24,000,000 20,000,000 21,000,000    
Interest income recorded for NAL loans 17,000,000 10,000,000 8,000,000    
Interest income under original terms for TDR loans 49,000,000 46,000,000 45,000,000    
Interest income recorded for TDR loans $ 40,000,000 41,000,000 39,000,000    
Threshold period of consecutive payments to remove from nonaccrual status 6 months        
Amount of security for borrowing and advances $ 19,700,000,000        
Loans held for investment 82,319,000 34,637,000   $ 56,000,000  
Macquarie Equipment Finance          
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]          
Amount of security for borrowing and advances $ 70,000,000        
Number of securitizations | securitization 2        
Commercial          
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]          
Allowance for loan and lease losses $ 451,091,000 398,753,000 389,834,000   428,358,000
Threshold outstanding balance for quarterly impairment evaluation $ 1,000,000.0        
Redefault status number of days 90 days        
Threshold period past due for nonperforming status 90 days        
Consumer          
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]          
Allowance for loan and lease losses $ 187,322,000 $ 199,090,000 $ 215,362,000   $ 219,512,000
Threshold period past due for nonperforming status 120 days        
Residential Mortgage | Consumer          
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]          
Threshold period past due for nonperforming status 150 days