INVESTMENT SECURITIES - Summary of Amortized Cost and Fair Values of AFS Securities by Contractual Maturity (Details) $ in Thousands	Sep. 30, 2026 USD ($)
Amortized Cost
Due in one year or less	$ 5,993
Due after one year through five years	44,966
Due after five years through ten years	54,039
Due after ten years	130,408
CMOs and MBSs	680,234
Asset-backed	69,804
Amortized Cost	985,444
Fair Value
Due in one year or less	5,916
Due after one year through five years	41,350
Due after five years through ten years	49,025
Due after ten years	107,826
CMOs and MBSs	645,897
Asset-backed	69,434
Total Fair Value	$ 919,448

Available For Sale Securities, Asset-backed Debt Securities, Amortized Cost

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