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Investment Securities - Summary of Amortized Cost and Estimated Fair Value, HTM and Restricted Equity Securities (Details) - USD ($) | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Securities to be held to maturity |  |  |
Amortized Cost | $ 369,900,000 | $ 385,669,000 |
Unrealized Gains | 98,000 | 383,000 |
Unrealized Losses | (55,005,000) | (47,482,000) |
Fair Value (Estimated) | 314,993,000 | 338,570,000 |
Less allowance for credit losses | (196,000) | (434,000) | $ 0
Net securities to be held to maturity | 369,704,000 | 385,235,000 |
Restricted equity securities |  |  |
Federal Home Loan Bank Stock | 6,166,000 | 2,348,000 |
Federal Reserve Bank Stock | 1,037,000 | 1,037,000 |
Restricted equity securities | 7,203,000 | 3,385,000 |
U.S. Treasury & Agency securities |  |  |
Securities to be held to maturity |  |  |
Amortized Cost | 38,100,000 | 40,100,000 |
Unrealized Gains | 0 | 0 |
Unrealized Losses | (9,938,000) | (9,601,000) |
Fair Value (Estimated) | 28,162,000 | 30,499,000 |
Less allowance for credit losses | 0 |  |
Mortgage-backed securities |  |  |
Securities to be held to maturity |  |  |
Amortized Cost | 52,370,000 | 56,401,000 |
Unrealized Gains | 15,000 | 70,000 |
Unrealized Losses | (11,360,000) | (10,398,000) |
Fair Value (Estimated) | 41,025,000 | 46,073,000 |
State and political subdivisions |  |  |
Securities to be held to maturity |  |  |
Amortized Cost | 252,180,000 | 254,418,000 |
Unrealized Gains | 83,000 | 313,000 |
Unrealized Losses | (31,739,000) | (24,213,000) |
Fair Value (Estimated) | 220,524,000 | 230,518,000 |
Less allowance for credit losses | (80,000) | (212,000) | 0
Corporate securities |  |  |
Securities to be held to maturity |  |  |
Amortized Cost | 27,250,000 | 34,750,000 |
Unrealized Gains | 0 | 0 |
Unrealized Losses | (1,968,000) | (3,270,000) |
Fair Value (Estimated) | 25,282,000 | 31,480,000 |
Less allowance for credit losses | $ (116,000) | $ (222,000) | $ 0

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