Quarterly report pursuant to Section 13 or 15(d)

LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Loan Purchases and Sales (Details)

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LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Loan Purchases and Sales (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Significant Purchases $ 667,031 $ 16,474
Financing Receivable, Significant Sales 144,519 1,147,559
Commercial and Industrial    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Significant Purchases 664,887 12,591
Financing Receivable, Significant Sales 144,519 85,700
Commercial Real Estate    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Significant Purchases 0 0
Financing Receivable, Significant Sales 0 0
Automobile    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Significant Purchases 0 0
Financing Receivable, Significant Sales   1,000,000
Financing Receivable, Significant Sales 0 1,061,859
Home Equity    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Significant Purchases 0 0
Financing Receivable, Significant Sales 0 0
Residential Mortgage    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Significant Purchases 2,144 3,883
Financing Receivable, Significant Sales 0 0
Other Consumer    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Significant Purchases 0 0
Financing Receivable, Significant Sales $ 0 $ 0