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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, 2021 USD ($) security | Dec. 31, 2020 USD ($) security
--- | --- | ---
Investment Securities |  |
Less than 12 months Fair Value | $ 77,613 | $ 25,212
Less than 12 months Unrealized Loss | (3,196) | (310)
12 months or more Fair Value | 2,159 | 2,235
12 months or more Unrealized Loss | (22) | (26)
Total Fair Value | 79,772 | 27,447
Total Unrealized Loss | $ (3,218) | $ (336)
Number of securities continuous unrealized loss position more than twelve months | security | 116 | 49
Collateralized mortgage obligations |  |
Investment Securities |  |
Less than 12 months Fair Value | $ 2,749 | $ 201
Less than 12 months Unrealized Loss | (66) |
12 months or more Fair Value | 1,136 | 1,188
12 months or more Unrealized Loss | (10) | (14)
Total Fair Value | 3,885 | 1,389
Total Unrealized Loss | (76) | (14)
Agency mortgage-backed securities |  |
Investment Securities |  |
Less than 12 months Fair Value | 13,534 |
Less than 12 months Unrealized Loss | (319) |
12 months or more Fair Value | 555 | 566
12 months or more Unrealized Loss | (10) | (10)
Total Fair Value | 14,089 | 566
Total Unrealized Loss | (329) | (10)
Municipal securities |  |
Investment Securities |  |
Less than 12 months Fair Value | 20,188 | 851
Less than 12 months Unrealized Loss | (349) | (2)
Total Fair Value | 20,188 | 851
Total Unrealized Loss | (349) | (2)
U.S. Government agency securities |  |
Investment Securities |  |
Less than 12 months Fair Value | 41,142 | 24,160
Less than 12 months Unrealized Loss | (2,462) | (308)
12 months or more Fair Value | 468 | 481
12 months or more Unrealized Loss | (2) | (2)
Total Fair Value | 41,610 | 24,641
Total Unrealized Loss | $ (2,464) | $ (310)

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