DEBT SECURITIES - Amortized cost and estimated fair value of held-to-maturity and available-for-sale securities (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Amortized Cost
Due within one year	$ 0
Due between one year and five years	0
Due between five years and ten years	0
Due after ten years	0
Securities (MBS and Agency)	41,937
Total	41,937	$ 45,623
Fair Value
Due within one year	0
Due between one year and five years	0
Due between five years and ten years	0
Due after ten years	0
Securities (MBS and Agency)	41,939
Total	41,939	45,607
Amortized Cost
Due within one year	0
Due between one year and five years	4,246
Due between five years and ten years	23,717
Due after ten years	0
Securities (MBS and Agency)	67,150
Amortized Cost	95,113	95,044
Fair Value
Due within one year	0
Due between one year and five years	4,322
Due between five years and ten years	22,637
Due after ten years	0
Securities (MBS and Agency)	63,816
Total	$ 90,775	$ 90,635