Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE FINANCIAL INSTRUMENTS - Gain (Loss) (Details)

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DERIVATIVE FINANCIAL INSTRUMENTS - Gain (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Cash Flow Hedging        
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges        
Amount of gain or (loss) recognized in OCI on derivatives (effective portion) $ (5,311) $ 8,301 $ 5,231 $ 26,057
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion) 123 (73) 769 334
Deposits | Interest expense deposits        
Increase or (decrease) to interest expense for derivatives designated as fair value hedges        
Increase or (decrease) to interest expense for derivatives designated as fair value hedges 0 (265) (82) (723)
Hedged Deposits | Interest expense deposits        
Increase or (decrease) to interest expense for derivatives designated as fair value hedges        
Increase or (decrease) to interest expense for derivatives designated as fair value hedges 0 259 72 709
Subordinated notes | Interest expense subordinated notes and other long term debt        
Increase or (decrease) to interest expense for derivatives designated as fair value hedges        
Increase or (decrease) to interest expense for derivatives designated as fair value hedges (9,688) 5,328 (2,880) 1,196
Hedged Subordinated notes | Interest expense subordinated notes and other long term debt        
Increase or (decrease) to interest expense for derivatives designated as fair value hedges        
Increase or (decrease) to interest expense for derivatives designated as fair value hedges 10,400 (5,328) 3,591 (1,196)
Other long-term debt | Interest expense subordinated notes and other long term debt        
Increase or (decrease) to interest expense for derivatives designated as fair value hedges        
Increase or (decrease) to interest expense for derivatives designated as fair value hedges (45,870) 37,272 37,179 49,168
Hedged Other long term debt | Interest expense subordinated notes and other long term debt        
Increase or (decrease) to interest expense for derivatives designated as fair value hedges        
Increase or (decrease) to interest expense for derivatives designated as fair value hedges 42,647 (36,283) (38,187) (48,546)
Loan | Interest and fee income loans and leases | Cash Flow Hedging        
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges        
Amount of gain or (loss) recognized in OCI on derivatives (effective portion) (5,311) 8,301 5,231 26,057
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion) 123 (73) 770 323
Securities Investment | Interest and fee income investment securities | Cash Flow Hedging        
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges        
Amount of gain or (loss) recognized in OCI on derivatives (effective portion) 0 0 0 0
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion) $ 0 $ 0 $ (1) $ 11