v3.26.1
FAIR VALUE MEASUREMENTS (Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
ASSETS    
Securities available for sale, at fair value $ 4,011,410 $ 4,194,301
Loans held for sale 20,776 18,486
Financial Derivatives 100,932 112,686
LIABILITIES    
Financial Derivatives 157,130 166,690
Fair Value, Inputs, Level 1 [Member]    
ASSETS    
Securities available for sale, at fair value 88,830 88,946
Loans held for sale 0 0
Financial Derivatives 0 0
LIABILITIES    
Financial Derivatives 0 0
Fair Value, Inputs, Level 2 [Member]    
ASSETS    
Securities available for sale, at fair value 3,922,580 4,105,355
Loans held for sale 20,776 18,486
Financial Derivatives 100,932 112,686
LIABILITIES    
Financial Derivatives 157,130 166,690
Fair Value, Inputs, Level 3 [Member]    
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
Fair Value, Recurring [Member]    
ASSETS    
Loans held for sale 20,776 18,486
Financial Derivatives 100,932 112,686
LIABILITIES    
Financial Derivatives 157,130 166,690
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
ASSETS    
Loans held for sale 0 0
Financial Derivatives 0 0
LIABILITIES    
Financial Derivatives 0 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
ASSETS    
Loans held for sale 20,776 18,486
Financial Derivatives 100,932 112,686
LIABILITIES    
Financial Derivatives 157,130 166,690
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
ASSETS    
Loans held for sale 0 0
Financial Derivatives 0 0
LIABILITIES    
Financial Derivatives 0 0
US Government Agencies Debt Securities [Member]    
ASSETS    
Securities available for sale, at fair value 102,103 104,002
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member]    
ASSETS    
Securities available for sale, at fair value 102,103 104,002
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
ASSETS    
Securities available for sale, at fair value 88,830 88,946
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
ASSETS    
Securities available for sale, at fair value 13,273 15,056
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
ASSETS    
Securities available for sale, at fair value 0 0
US States and Political Subdivisions Debt Securities [Member]    
ASSETS    
Securities available for sale, at fair value 472,204 487,885
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member]    
ASSETS    
Securities available for sale, at fair value 472,204 487,885
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
ASSETS    
Securities available for sale, at fair value 0 0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
ASSETS    
Securities available for sale, at fair value 472,204 487,885
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
ASSETS    
Securities available for sale, at fair value 0 0
Corporate Bond Securities [Member]    
ASSETS    
Securities available for sale, at fair value 213,010 217,934
Corporate Bond Securities [Member] | Fair Value, Recurring [Member]    
ASSETS    
Securities available for sale, at fair value 213,010 217,934
Corporate Bond Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
ASSETS    
Securities available for sale, at fair value 0 0
Corporate Bond Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
ASSETS    
Securities available for sale, at fair value 213,010 217,934
Corporate Bond Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
ASSETS    
Securities available for sale, at fair value 0 0
Collateralized Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member]    
ASSETS    
Securities available for sale, at fair value 3,222,113 3,382,524
Collateralized Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
ASSETS    
Securities available for sale, at fair value 0 0
Collateralized Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
ASSETS    
Securities available for sale, at fair value 3,222,113 3,382,524
Collateralized Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
ASSETS    
Securities available for sale, at fair value 0 0
Collateralized Securities, Other [Member]    
ASSETS    
Securities available for sale, at fair value 1,980 1,956
Collateralized Securities, Other [Member] | Fair Value, Recurring [Member]    
ASSETS    
Securities available for sale, at fair value 1,980 1,956
Collateralized Securities, Other [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
ASSETS    
Securities available for sale, at fair value 0 0
Collateralized Securities, Other [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
ASSETS    
Securities available for sale, at fair value 1,980 1,956
Collateralized Securities, Other [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
ASSETS    
Securities available for sale, at fair value $ 0 $ 0