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)

v3.19.1
FAIR VALUE MEASUREMENTS (Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
ASSETS    
Securities available for sale $ 2,109,062 $ 1,774,821
Loans held for sale 28,712 0
Fair value hedges 893 1,872
LIABILITIES    
Interest rate swap 24,865 19,426
Cash flow hedges 6,328 4,786
Fair value hedges 3,027 1,684
Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Securities available for sale 0 0
Loans held for sale 0  
Fair value hedges 0 0
LIABILITIES    
Interest rate swap 0 0
Cash flow hedges 0 0
Fair value hedges 0 0
Significant Other Observable Inputs Level 2    
ASSETS    
Securities available for sale 2,109,062 1,774,821
Loans held for sale 28,712  
Fair value hedges 893 1,872
LIABILITIES    
Interest rate swap 24,865 19,426
Cash flow hedges 6,328 4,786
Fair value hedges 3,027 1,684
Significant Unobservable Inputs Level 3    
ASSETS    
Securities available for sale 0 0
Loans held for sale 0  
Fair value hedges 0 0
LIABILITIES    
Interest rate swap 0 0
Cash flow hedges 0 0
Fair value hedges 0 0
Recurring    
ASSETS    
Loans held for sale 28,712  
Interest rate derivative 24,865 19,426
Fair value hedges 893 1,872
LIABILITIES    
Interest rate swap 24,865 19,426
Cash flow hedges 6,328 4,786
Fair value hedges 3,027 1,684
Recurring | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Loans held for sale 0  
Interest rate derivative 0 0
Fair value hedges 0 0
LIABILITIES    
Interest rate swap 0 0
Cash flow hedges 0 0
Fair value hedges 0 0
Recurring | Significant Other Observable Inputs Level 2    
ASSETS    
Loans held for sale 28,712  
Interest rate derivative 24,865 19,426
Fair value hedges 893 1,872
LIABILITIES    
Interest rate swap 24,865 19,426
Cash flow hedges 6,328 4,786
Fair value hedges 3,027 1,684
Recurring | Significant Unobservable Inputs Level 3    
ASSETS    
Loans held for sale 0  
Interest rate derivative 0 0
Fair value hedges 0 0
LIABILITIES    
Interest rate swap 0 0
Cash flow hedges 0 0
Fair value hedges 0 0
U.S. government and agency securities    
ASSETS    
Securities available for sale 4,457  
U.S. government and agency securities | Recurring    
ASSETS    
Securities available for sale 4,457  
U.S. government and agency securities | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Securities available for sale 0  
U.S. government and agency securities | Recurring | Significant Other Observable Inputs Level 2    
ASSETS    
Securities available for sale 4,457  
U.S. government and agency securities | Recurring | Significant Unobservable Inputs Level 3    
ASSETS    
Securities available for sale 0  
Obligations of states and political subdivisions    
ASSETS    
Securities available for sale 531,788 468,491
Obligations of states and political subdivisions | Recurring    
ASSETS    
Securities available for sale 531,788 468,491
Obligations of states and political subdivisions | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Securities available for sale 0 0
Obligations of states and political subdivisions | Recurring | Significant Other Observable Inputs Level 2    
ASSETS    
Securities available for sale 531,788 468,491
Obligations of states and political subdivisions | Recurring | Significant Unobservable Inputs Level 3    
ASSETS    
Securities available for sale 0 0
Corporate and other bonds | Recurring    
ASSETS    
Securities available for sale 178,887 167,696
Corporate and other bonds | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Securities available for sale 0 0
Corporate and other bonds | Recurring | Significant Other Observable Inputs Level 2    
ASSETS    
Securities available for sale 178,887 167,696
Corporate and other bonds | Recurring | Significant Unobservable Inputs Level 3    
ASSETS    
Securities available for sale 0 0
Mortgage-backed securities    
ASSETS    
Securities available for sale 1,390,393 1,129,865
Mortgage-backed securities | Recurring    
ASSETS    
Securities available for sale 1,390,393 1,129,865
Mortgage-backed securities | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Securities available for sale 0 0
Mortgage-backed securities | Recurring | Significant Other Observable Inputs Level 2    
ASSETS    
Securities available for sale 1,390,393 1,129,865
Mortgage-backed securities | Recurring | Significant Unobservable Inputs Level 3    
ASSETS    
Securities available for sale 0 0
Other securities    
ASSETS    
Securities available for sale 3,537 8,769
Other securities | Recurring    
ASSETS    
Securities available for sale 3,537 8,769
Other securities | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Securities available for sale 0 0
Other securities | Recurring | Significant Other Observable Inputs Level 2    
ASSETS    
Securities available for sale 3,537 8,769
Other securities | Recurring | Significant Unobservable Inputs Level 3    
ASSETS    
Securities available for sale $ 0 $ 0