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, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
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) $ 1,225 $ (5,311) $ 828 $ 5,231
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion) 144 123 (1,131) 769
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 0 0 (82)
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 0 0 72
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 (2,234) (9,688) (4,665) (2,880)
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 3,615 10,400 6,782 3,591
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 (6,431) (45,870) (880) 37,179
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 7,152 42,647 (1,226) (38,187)
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) 1,225 (5,311) 828 5,231
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion) 144 123 (1,131) 770
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 $ 0 $ (1)