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SECURITIES - Investments in a Continuous Unrealized Loss Position (Details) $ in Thousands | Mar. 31, 2021 USD ($) item | Dec. 31, 2020 USD ($)
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Available-for-sale: Unrealized Loss |  |
Less than 12 Months | $ (11,866) | $ (1,061)
12 Months or More | (39) | (30)
Total Unrealized Loss of Available-for-sale securities | (11,905) | (1,091)
Held-to-maturity: Unrealized Loss |  |
Less than 12 Months | (285) | (18)
Total Unrealized Loss of Held-to-maturity securities | (285) | (18)
Available-for-sale: Fair Value |  |
Less than 12 Months | 353,435 | 107,933
12 Months or More | 3,594 | 7,939
Total Fair Value Available-for-sale securities | 357,029 | 115,872
Held-to-maturity: Fair value |  |
Less than 12 Months | 7,669 | 2,983
Total Fair Value Held-to-maturity securities | 7,669 | 2,983
Total: Unrealized Losses |  |
Less Than 12 Months | (12,151) | (1,079)
12 Months or More | (39) | (30)
Total Unrealized Losses | (12,190) | (1,109)
Total: Fair Value |  |
Less than 12 Months | 361,104 | 110,916
12 Months or More | 3,594 | 7,939
Total Fair Value | $ 364,698 | 118,855
Number of securities in an unrealized loss position for a period of twelve months or more | item | 14 |
Number of securities in an unrealized loss position for a period of less than twelve months | item | 184 |
U.S. government agency |  |
Available-for-sale: Unrealized Loss |  |
Less than 12 Months | $ (3,341) | (9)
Total Unrealized Loss of Available-for-sale securities | (3,341) | (9)
Available-for-sale: Fair Value |  |
Less than 12 Months | 80,395 | 5,919
Total Fair Value Available-for-sale securities | 80,395 | 5,919
Municipal |  |
Available-for-sale: Unrealized Loss |  |
Less than 12 Months | (4,358) | (280)
Total Unrealized Loss of Available-for-sale securities | (4,358) | (280)
Available-for-sale: Fair Value |  |
Less than 12 Months | 119,502 | 19,652
Total Fair Value Available-for-sale securities | 119,502 | 19,652
Mortgage-backed: Agency residential |  |
Available-for-sale: Unrealized Loss |  |
Less than 12 Months | (165) | (142)
12 Months or More | (39) | (20)
Total Unrealized Loss of Available-for-sale securities | (204) | (162)
Available-for-sale: Fair Value |  |
Less than 12 Months | 26,810 | 20,387
12 Months or More | 3,594 | 4,490
Total Fair Value Available-for-sale securities | 30,404 | 24,877
Mortgage-backed: Agency commercial |  |
Available-for-sale: Unrealized Loss |  |
Less than 12 Months | (3,556) | (524)
12 Months or More |  | (10)
Total Unrealized Loss of Available-for-sale securities | (3,556) | (534)
Held-to-maturity: Unrealized Loss |  |
Less than 12 Months | (285) | (18)
Total Unrealized Loss of Held-to-maturity securities | (285) | (18)
Available-for-sale: Fair Value |  |
Less than 12 Months | 119,719 | 57,126
12 Months or More |  | 3,449
Total Fair Value Available-for-sale securities | 119,719 | 60,575
Held-to-maturity: Fair value |  |
Less than 12 Months | 7,669 | 2,983
Total Fair Value Held-to-maturity securities | 7,669 | 2,983
Corporate |  |
Available-for-sale: Unrealized Loss |  |
Less than 12 Months | (446) | (106)
Total Unrealized Loss of Available-for-sale securities | (446) | (106)
Available-for-sale: Fair Value |  |
Less than 12 Months | 7,009 | 4,849
Total Fair Value Available-for-sale securities | $ 7,009 | $ 4,849

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