Quarterly report pursuant to Section 13 or 15(d)

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

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LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Narrative (Details)
 3 Months Ended 6 Months Ended
Jun. 30, 2016
USD ($)
reserve
component
Jun. 30, 2016
USD ($)
reserve
securitization
component
Mar. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Jun. 30, 2015
USD ($)
Mar. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Loans and leases receivable net premium $ 270,000,000 $ 270,000,000   $ 262,000,000      
Allowance for loan and lease losses $ 623,064,000 $ 623,064,000 $ 613,719,000 597,843,000 $ 599,542,000 $ 605,126,000 $ 605,196,000
Number of days past due   30 days          
Allowance number of reserves | reserve 2 2          
Allowance number of components of reserve | component 2 2          
Collateral for secured borrowings $ 18,000,000,000 $ 18,000,000,000          
Macquarie Equipment Finance              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Collateral for secured borrowings 106,000,000 $ 106,000,000          
Number of securitizations acquired | securitization   2          
Commercial Real Estate              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Allowance for loan and lease losses 101,042,000 $ 101,042,000 102,074,000 100,007,000 92,060,000 100,752,000 102,839,000
Threshold period past due for nonperforming status   90 days          
Threshold outstanding balance for quarterly impairment evaluation   $ 1,000,000.0          
Threshold period past due for write-off   90 days          
Other Consumer              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Allowance for loan and lease losses 29,152,000 $ 29,152,000 24,302,000 24,269,000 20,482,000 17,016,000 38,272,000
Threshold period past due for nonperforming status   120 days          
Threshold period past due for write-off   120 days          
Commercial and Industrial              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Allowance for loan and lease losses $ 323,465,000 $ 323,465,000 320,367,000 298,746,000 285,041,000 284,573,000 286,995,000
Threshold period past due for nonperforming status 90 days            
Threshold outstanding balance for quarterly impairment evaluation   $ 1,000,000.0          
Threshold period past due for write-off   90 days          
Residential Mortgage              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Allowance for loan and lease losses $ 42,392,000 $ 42,392,000 40,842,000 41,646,000 51,679,000 55,380,000 47,211,000
Threshold period past due for nonperforming status 150 days            
Threshold period past due for write-off   150 days          
Home Equity              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Allowance for loan and lease losses $ 76,482,000 $ 76,482,000 78,102,000 83,671,000 111,178,000 110,280,000 96,413,000
Automobile              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Allowance for loan and lease losses $ 50,531,000 $ 50,531,000 $ 48,032,000 $ 49,504,000 $ 39,102,000 $ 37,125,000 $ 33,466,000
Threshold period past due for nonperforming status 120 days            
Threshold period past due for write-off   120 days          
Secured by first-lien | Home Equity              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Threshold period past due for nonperforming status 150 days            
Threshold period past due for write-off   150 days          
Secured by junior-lien | Home Equity              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Threshold period past due for nonperforming status 120 days            
Threshold period past due for write-off   120 days