Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS (Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details)

v3.8.0.1
FAIR VALUE MEASUREMENTS (Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
ASSETS    
Securities available for sale $ 1,253,179 $ 974,222
Loans held for sale 27,727 40,662
Cash flow hedges   49
Fair value hedges 3,468 1,598
Best efforts forward delivery commitments   12
LIABILITIES    
Interest rate swap 16,009 1,350
Cash flow hedges 5,063 8,005
Fair value hedges   76
Best efforts forward delivery commitments 22  
Obligations of States and Political Subdivisions    
ASSETS    
Securities available for sale 364,639 301,824
Corporate and Other Bonds    
ASSETS    
Securities available for sale 123,140 113,880
Mortgage-Backed Securities    
ASSETS    
Securities available for sale 754,412 548,858
Other Securities    
ASSETS    
Securities available for sale 10,988 9,660
Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Securities available for sale 0 0
Loans held for sale 0 0
Cash flow hedges   0
Fair value hedges 0 0
Best efforts forward delivery commitments   0
LIABILITIES    
Interest rate swap 0 0
Cash flow hedges 0 0
Fair value hedges   0
Best efforts forward delivery commitments 0  
Significant Other Observable Inputs Level 2    
ASSETS    
Securities available for sale 1,253,179 974,222
Loans held for sale 27,727 40,662
Cash flow hedges   49
Fair value hedges 3,468 1,598
Best efforts forward delivery commitments   0
LIABILITIES    
Interest rate swap 16,009 1,350
Cash flow hedges 5,063 8,005
Fair value hedges   76
Best efforts forward delivery commitments 0  
Significant Unobservable Inputs Level 3    
ASSETS    
Securities available for sale 0 0
Loans held for sale 0 0
Cash flow hedges   0
Fair value hedges 0 0
Best efforts forward delivery commitments   12
LIABILITIES    
Interest rate swap 0 0
Cash flow hedges 0 0
Fair value hedges   0
Best efforts forward delivery commitments 22  
Recurring    
ASSETS    
Loans held for sale 27,727 40,662
Interest rate derivative 16,009 1,350
Cash flow hedges   49
Fair value hedges 3,468 1,598
Best efforts forward delivery commitments   12
LIABILITIES    
Interest rate swap 16,009 1,350
Cash flow hedges 5,063 8,005
Fair value hedges   76
Best efforts forward delivery commitments 22  
Recurring | Interest Rate Lock Commitments    
ASSETS    
Interest rate derivative 828 559
Recurring | Obligations of States and Political Subdivisions    
ASSETS    
Securities available for sale 364,639 301,824
Recurring | Corporate and Other Bonds    
ASSETS    
Securities available for sale 123,140 113,880
Recurring | Mortgage-Backed Securities    
ASSETS    
Securities available for sale 754,412 548,858
Recurring | Other Securities    
ASSETS    
Securities available for sale 10,988 9,660
Recurring | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Loans held for sale 0 0
Interest rate derivative 0 0
Cash flow hedges   0
Fair value hedges 0 0
Best efforts forward delivery commitments   0
LIABILITIES    
Interest rate swap 0 0
Cash flow hedges 0 0
Fair value hedges   0
Best efforts forward delivery commitments 0  
Recurring | Quoted Prices in Active Markets for Identical Assets Level 1 | Interest Rate Lock Commitments    
ASSETS    
Interest rate derivative 0 0
Recurring | Quoted Prices in Active Markets for Identical Assets Level 1 | Obligations of States and Political Subdivisions    
ASSETS    
Securities available for sale 0 0
Recurring | Quoted Prices in Active Markets for Identical Assets Level 1 | Corporate and Other Bonds    
ASSETS    
Securities available for sale 0 0
Recurring | Quoted Prices in Active Markets for Identical Assets Level 1 | Mortgage-Backed Securities    
ASSETS    
Securities available for sale 0 0
Recurring | Quoted Prices in Active Markets for Identical Assets Level 1 | Other Securities    
ASSETS    
Securities available for sale 0 0
Recurring | Significant Other Observable Inputs Level 2    
ASSETS    
Loans held for sale 27,727 40,662
Interest rate derivative 16,009 1,350
Cash flow hedges   49
Fair value hedges 3,468 1,598
Best efforts forward delivery commitments   0
LIABILITIES    
Interest rate swap 16,009 1,350
Cash flow hedges 5,063 8,005
Fair value hedges   76
Best efforts forward delivery commitments 0  
Recurring | Significant Other Observable Inputs Level 2 | Interest Rate Lock Commitments    
ASSETS    
Interest rate derivative 0 0
Recurring | Significant Other Observable Inputs Level 2 | Obligations of States and Political Subdivisions    
ASSETS    
Securities available for sale 364,639 301,824
Recurring | Significant Other Observable Inputs Level 2 | Corporate and Other Bonds    
ASSETS    
Securities available for sale 123,140 113,880
Recurring | Significant Other Observable Inputs Level 2 | Mortgage-Backed Securities    
ASSETS    
Securities available for sale 754,412 548,858
Recurring | Significant Other Observable Inputs Level 2 | Other Securities    
ASSETS    
Securities available for sale 10,988 9,660
Recurring | Significant Unobservable Inputs Level 3    
ASSETS    
Loans held for sale 0 0
Interest rate derivative 0 0
Cash flow hedges   0
Fair value hedges 0 0
Best efforts forward delivery commitments   12
LIABILITIES    
Interest rate swap 0 0
Cash flow hedges 0 0
Fair value hedges   0
Best efforts forward delivery commitments 22  
Recurring | Significant Unobservable Inputs Level 3 | Interest Rate Lock Commitments    
ASSETS    
Interest rate derivative 828 559
Recurring | Significant Unobservable Inputs Level 3 | Obligations of States and Political Subdivisions    
ASSETS    
Securities available for sale 0 0
Recurring | Significant Unobservable Inputs Level 3 | Corporate and Other Bonds    
ASSETS    
Securities available for sale 0 0
Recurring | Significant Unobservable Inputs Level 3 | Mortgage-Backed Securities    
ASSETS    
Securities available for sale 0 0
Recurring | Significant Unobservable Inputs Level 3 | Other Securities    
ASSETS    
Securities available for sale $ 0 $ 0