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INVESTMENTS (Schedule of Amortized Cost and Estimated Fair Values of Debt Securities by Contractual Maturity) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Available-for-sale, Amortized Cost
Due in one year or less	$ 0
Due after one year through five years	10,944
Due after five years through ten years	16,160
Due after ten years	0
Subtotal	27,104
Mortgage-related securities	637,664
Available-for-sale securities, book value	664,768	$ 702,937
Available-for-sale, Fair Value
Due in one year or less	0
Due after one year through five years	10,439
Due after five years through ten years	15,179
Due after ten years	0
Subtotal	25,618
Mortgage-related securities	577,593
Fair value, total	$ 603,211	$ 625,808

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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