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Securities - Schedule of Held-to-maturity, Unrealized Loss on Investments (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Held-to-maturity: |  |
12 Months or Greater, Fair Value | $ 113,267 | $ 262,536
12 Months or Greater, Gross Unrealized Losses | $ (14,512) | $ (18,698)
12 Months or Greater, Number of Securities | 53 | 57
Total, Fair Value | $ 113,267 | $ 262,536
Total, Gross Unrealized Losses | $ (14,512) | $ (18,698)
Total, Number of Securities | 53 | 57
US Treasury Securities [Member] |  |
Held-to-maturity: |  |
12 Months or Greater, Fair Value |  | $ 148,584
12 Months or Greater, Gross Unrealized Losses |  | $ (1,482)
12 Months or Greater, Number of Securities |  | 4
Total, Fair Value |  | $ 148,584
Total, Gross Unrealized Losses |  | $ (1,482)
Total, Number of Securities |  | 4
US Government-sponsored Enterprises Debt Securities [Member] |  |
Held-to-maturity: |  |
12 Months or Greater, Fair Value | $ 42,780 | $ 42,194
12 Months or Greater, Gross Unrealized Losses | $ (5,643) | $ (7,143)
12 Months or Greater, Number of Securities | 13 | 13
Total, Fair Value | $ 42,780 | $ 42,194
Total, Gross Unrealized Losses | $ (5,643) | $ (7,143)
Total, Number of Securities | 13 | 13
Municipal securities [Member] |  |
Held-to-maturity: |  |
12 Months or Greater, Fair Value | $ 46,134 | $ 46,500
12 Months or Greater, Gross Unrealized Losses | $ (5,779) | $ (6,178)
12 Months or Greater, Number of Securities | 35 | 35
Total, Fair Value | $ 46,134 | $ 46,500
Total, Gross Unrealized Losses | $ (5,779) | $ (6,178)
Total, Number of Securities | 35 | 35
Mortgage-backed securities (GSEs) [Member] |  |
Held-to-maturity: |  |
12 Months or Greater, Fair Value | $ 24,353 | $ 25,258
12 Months or Greater, Gross Unrealized Losses | $ (3,090) | $ (3,895)
12 Months or Greater, Number of Securities | 5 | 5
Total, Fair Value | $ 24,353 | $ 25,258
Total, Gross Unrealized Losses | $ (3,090) | $ (3,895)
Total, Number of Securities | 5 | 5

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- Definition Number of investments in debt securities held to maturity, in unrealized loss position, for 12 months or longer, without allowance for credit loss. + References No definition available. + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for 12 months or longer. + References No definition available. + Details
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- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity), in continuous unrealized loss position for 12 months or longer. + References No definition available. + Details
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- Definition Disclosure regarding factors used to determine that the impairment of securities categorized as held-to-maturity where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the number of investment positions in the held-to-maturity investments determined to be temporarily impaired. + References No definition available. + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position. + References No definition available. + Details
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- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position. + References No definition available. + Details
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