FAIR VALUE - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	$ 4,565,302	$ 5,229,984
MBS [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	2,663,162	2,784,779
Fair Value, Measurements, Recurring [Member]
Assets Fair Value Disclosure [Abstract]
Equity securities	4,886	4,893
Derivative Assets	318	341
Derivative Liabilities [Abstract]
Derivative Liabilities	150	317
Fair Value, Measurements, Recurring [Member] | U S Treasury Securities [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	59,189	135,393
Fair Value, Measurements, Recurring [Member] | Government Agencies Debt Securities [Member] | Noncallable [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	533,296	433,437
Fair Value, Measurements, Recurring [Member] | Government Agencies Debt Securities [Member] | Call Option [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	1,307,035	1,874,960
Fair Value, Measurements, Recurring [Member] | MBS [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	2,663,162	2,784,779
Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	1,620	1,415
Fair Value, Measurements, Recurring [Member] | Other Investments [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	1,000	0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member]
Assets Fair Value Disclosure [Abstract]
Equity securities	4,886	4,893
Derivative Assets	0	0
Derivative Liabilities [Abstract]
Derivative Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | U S Treasury Securities [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	59,189	135,393
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Government Agencies Debt Securities [Member] | Noncallable [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Government Agencies Debt Securities [Member] | Call Option [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | MBS [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | US States and Political Subdivisions Debt Securities [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Other Investments [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member]
Assets Fair Value Disclosure [Abstract]
Equity securities	0	0
Derivative Assets	318	341
Derivative Liabilities [Abstract]
Derivative Liabilities	150	317
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | U S Treasury Securities [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Government Agencies Debt Securities [Member] | Noncallable [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	533,296	433,437
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Government Agencies Debt Securities [Member] | Call Option [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	1,307,035	1,874,960
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | MBS [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	2,658,967	2,779,994
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Other Investments [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member]
Assets Fair Value Disclosure [Abstract]
Equity securities	0	0
Derivative Assets	0	0
Derivative Liabilities [Abstract]
Derivative Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | U S Treasury Securities [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Government Agencies Debt Securities [Member] | Noncallable [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Government Agencies Debt Securities [Member] | Call Option [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | MBS [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	4,195	4,785
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | US States and Political Subdivisions Debt Securities [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	1,620	1,415
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Other Investments [Member]
Assets Fair Value Disclosure [Abstract]
Available-For-Sale Securities, Debt Securities	$ 1,000	$ 0