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)

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FAIR VALUE MEASUREMENTS (Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
ASSETS    
Securities available for sale, at fair value $ 2,202,216 $ 2,231,261
Loans held for sale 12,200 6,710
Financial Derivatives 99,259 93,027
LIABILITIES    
Financial Derivatives 226,777 206,561
Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Securities available for sale, at fair value 60,868 61,311
Loans held for sale 0 0
Financial Derivatives 0 0
LIABILITIES    
Financial Derivatives 0 0
Significant Other Observable Inputs Level 2    
ASSETS    
Securities available for sale, at fair value 2,141,348 2,169,950
Loans held for sale 12,200 6,710
Financial Derivatives 99,259 93,027
LIABILITIES    
Financial Derivatives 226,777 206,561
Significant Unobservable Inputs Level 3    
ASSETS    
Securities available for sale, at fair value 0 0
Loans held for sale 0 0
Financial Derivatives 0 0
LIABILITIES    
Financial Derivatives 0 0
Recurring    
ASSETS    
Loans held for sale 12,200 6,710
Financial Derivatives 99,259 93,027
LIABILITIES    
Financial Derivatives 226,777 206,561
Recurring | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Loans held for sale 0 0
Financial Derivatives 0 0
LIABILITIES    
Financial Derivatives 0 0
Recurring | Significant Other Observable Inputs Level 2    
ASSETS    
Loans held for sale 12,200 6,710
Financial Derivatives 99,259 93,027
LIABILITIES    
Financial Derivatives 226,777 206,561
Recurring | Significant Unobservable Inputs Level 3    
ASSETS    
Loans held for sale 0 0
Financial Derivatives 0 0
LIABILITIES    
Financial Derivatives 0 0
U.S. government and agency securities    
ASSETS    
Securities available for sale, at fair value 62,736 63,356
U.S. government and agency securities | Recurring    
ASSETS    
Securities available for sale, at fair value 62,736 63,356
U.S. government and agency securities | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Securities available for sale, at fair value 60,868 61,311
U.S. government and agency securities | Recurring | Significant Other Observable Inputs Level 2    
ASSETS    
Securities available for sale, at fair value 1,868 2,045
U.S. government and agency securities | Recurring | Significant Unobservable Inputs Level 3    
ASSETS    
Securities available for sale, at fair value 0 0
Obligations of states and political subdivisions    
ASSETS    
Securities available for sale, at fair value 461,850 475,447
Obligations of states and political subdivisions | Recurring    
ASSETS    
Securities available for sale, at fair value 461,850 475,447
Obligations of states and political subdivisions | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Securities available for sale, at fair value 0 0
Obligations of states and political subdivisions | Recurring | Significant Other Observable Inputs Level 2    
ASSETS    
Securities available for sale, at fair value 461,850 475,447
Obligations of states and political subdivisions | Recurring | Significant Unobservable Inputs Level 3    
ASSETS    
Securities available for sale, at fair value 0 0
Corporate and other bonds    
ASSETS    
Securities available for sale, at fair value 250,264 241,889
Corporate and other bonds | Recurring    
ASSETS    
Securities available for sale, at fair value 250,264 241,889
Corporate and other bonds | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Securities available for sale, at fair value 0 0
Corporate and other bonds | Recurring | Significant Other Observable Inputs Level 2    
ASSETS    
Securities available for sale, at fair value 250,264 241,889
Corporate and other bonds | Recurring | Significant Unobservable Inputs Level 3    
ASSETS    
Securities available for sale, at fair value 0 0
Mortgage-backed securities | Recurring    
ASSETS    
Securities available for sale, at fair value 1,425,587 1,448,817
Mortgage-backed securities | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Securities available for sale, at fair value 0 0
Mortgage-backed securities | Recurring | Significant Other Observable Inputs Level 2    
ASSETS    
Securities available for sale, at fair value 1,425,587 1,448,817
Mortgage-backed securities | Recurring | Significant Unobservable Inputs Level 3    
ASSETS    
Securities available for sale, at fair value 0 0
Other securities    
ASSETS    
Securities available for sale, at fair value 1,779 1,752
Other securities | Recurring    
ASSETS    
Securities available for sale, at fair value 1,779 1,752
Other securities | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Securities available for sale, at fair value 0 0
Other securities | Recurring | Significant Other Observable Inputs Level 2    
ASSETS    
Securities available for sale, at fair value 1,779 1,752
Other securities | Recurring | Significant Unobservable Inputs Level 3    
ASSETS    
Securities available for sale, at fair value $ 0 $ 0