SECURITIES - Summary of amortized cost and fair value of debt securities shown by contractual maturity (Details) $ in Thousands	Sep. 30, 2021 USD ($)
Amortized Cost
Due in one year or less	$ 11,257
Due from one year to five years	91,243
Due from five to ten years	38,783
Due after ten years	4,973
Mortgage-backed securities	165,427
Total	311,683
Estimated Fair Value
Due in one year or less	11,388
Due from one year to five years	93,410
Due from five to ten years	39,422
Due after ten years	4,909
Mortgage-backed securities	165,017
Total	314,146
Amortized Cost
Due in one year or less	3,000
Due from one year to five years	11,084
Due from five to ten years	9,241
Total	23,325
Estimated Fair Value
Due in one year or less	3,000
Due from one year to five years	11,067
Due from five to ten years	9,080
Total	$ 23,147