FAIR VALUE MEASUREMENTS (Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
ASSETS
Securities available for sale, at fair value	$ 3,876,717	$ 4,194,301
Loans held for sale	23,074	18,486
Financial Derivatives	92,957	112,686
LIABILITIES
Financial Derivatives	152,093	166,690
Fair Value, Inputs, Level 1 [Member]
ASSETS
Securities available for sale, at fair value	89,077	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	3,787,640	4,105,355
Loans held for sale	23,074	18,486
Financial Derivatives	92,957	112,686
LIABILITIES
Financial Derivatives	152,093	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	23,074	18,486
Financial Derivatives	92,957	112,686
LIABILITIES
Financial Derivatives	152,093	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	23,074	18,486
Financial Derivatives	92,957	112,686
LIABILITIES
Financial Derivatives	152,093	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	101,112	104,002
US Government Agencies Debt Securities [Member] \| Fair Value, Recurring [Member]
ASSETS
Securities available for sale, at fair value	101,112	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	89,077	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	12,035	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	491,271	487,885
US States and Political Subdivisions Debt Securities [Member] \| Fair Value, Recurring [Member]
ASSETS
Securities available for sale, at fair value	491,271	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	491,271	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	194,584	217,934
Corporate Bond Securities [Member] \| Fair Value, Recurring [Member]
ASSETS
Securities available for sale, at fair value	194,584	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	194,584	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	3,087,750	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	3,087,750	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	2,000	1,956
Collateralized Securities, Other [Member] \| Fair Value, Recurring [Member]
ASSETS
Securities available for sale, at fair value	2,000	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	2,000	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