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INVESTMENT SECURITIES - Investment Category of Available-for-Sale Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Fair Value |  |
Less than 12 Months | $ 55,262 | $ 16,713
12 Months or More | 26,335 | 32,562
Total | 81,597 | 49,275
Unrealized Loss |  |
Less than 12 Months | 633 | 82
12 Months or More | 242 | 451
Total | 875 | 533
U.S. government agency obligations |  |
Fair Value |  |
Less than 12 Months | 0 | 7,654
12 Months or More | 13,088 | 6,834
Total | 13,088 | 14,488
Unrealized Loss |  |
Less than 12 Months | 0 | 17
12 Months or More | 65 | 53
Total | 65 | 70
Mortgage-backed securities |  |
Fair Value |  |
Less than 12 Months | 39,035 |
12 Months or More | 0 |
Total | 39,035 |
Unrealized Loss |  |
Less than 12 Months | 401 |
12 Months or More | 0 |
Total | 401 |
Corporate debt securities |  |
Fair Value |  |
Less than 12 Months | 9,335 | 3,447
12 Months or More | 1,418 | 1,418
Total | 10,753 | 4,865
Unrealized Loss |  |
Less than 12 Months | 203 | 27
12 Months or More | 82 | 82
Total | 285 | 109
Corporate asset-based securities |  |
Fair Value |  |
Less than 12 Months | 5,947 | 0
12 Months or More | 11,829 | 24,310
Total | 17,776 | 24,310
Unrealized Loss |  |
Less than 12 Months | 19 | 0
12 Months or More | 95 | 316
Total | 114 | 316
Trust preferred securities |  |
Fair Value |  |
Less than 12 Months | 945 | 5,612
12 Months or More | 0 | 0
Total | 945 | 5,612
Unrealized Loss |  |
Less than 12 Months | 10 | 38
12 Months or More | 0 | 0
Total | $ 10 | $ 38

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
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