SECURITIES - Additional Information (Details) - USD ($) $ in Millions |
Sep. 30, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Schedule Of Available For Sale Securities [Line Items] | ||
| Weighted average yield, total | 4.30% | 5.32% |
| US Treasury Securities | Other | ||
| Schedule Of Available For Sale Securities [Line Items] | ||
| Securities pledged as collateral | $ 0.5 | $ 0.5 |
| Agency mortgage-backed Securities | ||
| Schedule Of Available For Sale Securities [Line Items] | ||
| Securities pledged as collateral | $ 169.7 | |
| Agency Mortgage-backed Securities and Beneficial interests in FHLMC securitization | ||
| Schedule Of Available For Sale Securities [Line Items] | ||
| Weighted average yield, total | 2.00% | 2.39% |