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SECURITIES - Available-for-sale Debt Securities by Contractual Maturity (Details) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019
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Available-for-sale Securities |  |
Due in one year or less, amortized cost | $ 13,409,000 |
Due in one year or less, fair value | 13,506,000 |
Due from one year through five years. amortized cost | 46,172,000 |
Due from one year through five years, fair value | 47,758,000 |
Due from five years through ten years, amortized cost | 47,535,000 |
Due from five years through ten years, fair value | 50,110,000 |
Due after ten years, amortized cost | 92,074,000 |
Due after ten years, fair value | 97,005,000 |
Sub-total, amortized cost | 199,190,000 |
Sub-total, fair value | 208,379,000 |
Total, amortized cost | 334,552,000 | $ 342,278,000
Total, fair value | 349,332,000 | 346,723,000
Investment Securities [Member] |  |
Available-for-sale Securities |  |
Investment pledged as collateral | 247,373,000 | 215,270,000
Residential Passthrough Securities |  |
Available-for-sale Securities |  |
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, amortized cost | 36,853,000 |
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, fair value | 38,176,000 |
Total, amortized cost | 36,853,000 | 58,875,000
Total, fair value | 38,176,000 | 59,210,000
Residential Collateralized Mortgage Obligations |  |
Available-for-sale Securities |  |
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, amortized cost | 56,048,000 |
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, fair value | 57,467,000 |
Total, amortized cost | 56,048,000 | 115,025,000
Total, fair value | 57,467,000 | $ 114,723,000
Commercial mortgage-backed securities |  |
Available-for-sale Securities |  |
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, amortized cost | 42,461,000 |
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, fair value | $ 45,310,000 |

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