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Investment Securities - Schedule of Unrealized Loss Positions (Details) $ in Thousands | Mar. 31, 2024 USD ($) loan | Dec. 31, 2023 USD ($) loan
--- | --- | ---
Investments in an Unrealized Loss Position |  |
Less than 12 months, fair value | $ 24,883 | $ 3,172
Less than 12 months, unrealized loss | (180) | (77)
12 months or more, fair value | 272,412 | 293,311
12 months or more, unrealized loss | $ (36,606) | $ (33,412)
United States government agency securities |  |
Description and Number of Positions |  |
Number of investments in an unrealized loss position | loan | 26 | 25
Investments in an Unrealized Loss Position |  |
Less than 12 months, fair value | $ 4,363 | $ 316
Less than 12 months, unrealized loss | (21) | 0
12 months or more, fair value | 33,669 | 34,619
12 months or more, unrealized loss | $ (6,011) | $ (5,603)
United States sponsored mortgage-backed securities |  |
Description and Number of Positions |  |
Number of investments in an unrealized loss position | loan | 54 | 47
Investments in an Unrealized Loss Position |  |
Less than 12 months, fair value | $ 19,467 | $ 0
Less than 12 months, unrealized loss | (146) | 0
12 months or more, fair value | 48,156 | 50,345
12 months or more, unrealized loss | $ (11,774) | $ (10,549)
United States treasury securities |  |
Description and Number of Positions |  |
Number of investments in an unrealized loss position | loan | 23 | 23
Investments in an Unrealized Loss Position |  |
Less than 12 months, fair value | $ 0 | $ 0
Less than 12 months, unrealized loss | 0 | 0
12 months or more, fair value | 100,563 | 100,354
12 months or more, unrealized loss | $ (5,761) | $ (6,045)
Municipal securities |  |
Description and Number of Positions |  |
Number of investments in an unrealized loss position | loan | 215 | 216
Investments in an Unrealized Loss Position |  |
Less than 12 months, fair value | $ 555 | $ 847
Less than 12 months, unrealized loss | (11) | (10)
12 months or more, fair value | 86,573 | 106,060
12 months or more, unrealized loss | $ (12,932) | $ (11,148)
Corporate debt securities |  |
Description and Number of Positions |  |
Number of investments in an unrealized loss position | loan | 7 | 7
Investments in an Unrealized Loss Position |  |
Less than 12 months, fair value | $ 498 | $ 2,009
Less than 12 months, unrealized loss | (2) | (67)
12 months or more, fair value | 3,451 | 1,933
12 months or more, unrealized loss | $ (128) | $ (67)

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