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Investment Securities - Gross Unrealized Losses and Fair Value Aggregated by Investment Category and Length of Time in Continuous Unrealized Loss Position (Details) $ in Thousands | Mar. 31, 2020 USD ($) security | Dec. 31, 2019 USD ($) security
--- | --- | ---
Investment Securities |  |
Less than 12 months Fair Value | $ 13,942 | $ 18,766
Less than 12 months Unrealized Loss | (166) | (97)
12 months or more Fair Value | 2,514 | 19,112
12 months or more Unrealized Loss | (84) | (247)
Total Fair Value | 16,456 | 37,878
Total Unrealized Loss | $ (250) | $ (344)
Number of securities continuous unrealized loss position more than twelve months | security | 39 | 97
Collateralized mortgage obligations |  |
Investment Securities |  |
Less than 12 months Fair Value | $ 10,036 | $ 11,792
Less than 12 months Unrealized Loss | (130) | (65)
12 months or more Fair Value | 1,335 | 7,330
12 months or more Unrealized Loss | (67) | (122)
Total Fair Value | 11,371 | 19,122
Total Unrealized Loss | (197) | (187)
Agency mortgage-backed securities |  |
Investment Securities |  |
Less than 12 months Fair Value | 829 | 4,577
Less than 12 months Unrealized Loss | (13) | (20)
12 months or more Fair Value | 635 | 10,918
12 months or more Unrealized Loss | (10) | (115)
Total Fair Value | 1,464 | 15,495
Total Unrealized Loss | (23) | (135)
Municipal securities |  |
Investment Securities |  |
Less than 12 months Fair Value | 2,502 | 1,806
Less than 12 months Unrealized Loss | (19) | (7)
12 months or more Fair Value | 544 | 864
12 months or more Unrealized Loss | (7) | (10)
Total Fair Value | 3,046 | 2,670
Total Unrealized Loss | (26) | (17)
U.S. Government agency securities |  |
Investment Securities |  |
Less than 12 months Fair Value | 575 | 591
Less than 12 months Unrealized Loss | (4) | (5)
Total Fair Value | 575 | 591
Total Unrealized Loss | $ (4) | $ (5)

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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=118955579&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=118939692&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=118942371&loc=SL82922954-210456 + Details
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