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Investment in Securities - Schedule of the Fair Values of Securities with Unrealized Losses (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
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Marketable Securities [Line Items] |  |
AFS, Less than 12 months, Estimated Fair Value | $ 90,092 | $ 97,255
AFS, Less than 12 months, Unrealized Losses | 812 | 2,193
AFS, 12 months or more, Estimated Fair Value | 342,949 | 401,004
AFS, 12 months or more, Unrealized Losses | 44,620 | 57,512
AFS, Total Estimated Fair Value | 433,041 | 498,259
AFS, Total Unrealized Losses | 45,432 | 59,705
State and political subdivisions |  |
Marketable Securities [Line Items] |  |
AFS, Less than 12 months, Estimated Fair Value | 16,938 | 4,082
AFS, Less than 12 months, Unrealized Losses | 87 | 8
AFS, 12 months or more, Estimated Fair Value | 153,575 | 163,893
AFS, 12 months or more, Unrealized Losses | 14,087 | 16,964
AFS, Total Estimated Fair Value | 170,513 | 167,975
AFS, Total Unrealized Losses | 14,174 | 16,972
Mortgage-backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises |  |
Marketable Securities [Line Items] |  |
AFS, Less than 12 months, Estimated Fair Value | 70,155 | 85,272
AFS, Less than 12 months, Unrealized Losses | 724 | 2,086
AFS, 12 months or more, Estimated Fair Value | 131,594 | 139,676
AFS, 12 months or more, Unrealized Losses | 27,494 | 32,009
AFS, Total Estimated Fair Value | 201,749 | 224,948
AFS, Total Unrealized Losses | 28,218 | 34,095
Corporate bonds |  |
Marketable Securities [Line Items] |  |
AFS, Less than 12 months, Estimated Fair Value | 2,999 | 7,901
AFS, Less than 12 months, Unrealized Losses | 1 | 99
AFS, 12 months or more, Estimated Fair Value | 28,475 | 66,860
AFS, 12 months or more, Unrealized Losses | 2,549 | 7,960
AFS, Total Estimated Fair Value | 31,474 | 74,761
AFS, Total Unrealized Losses | 2,550 | 8,059
Asset backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises |  |
Marketable Securities [Line Items] |  |
AFS, Less than 12 months, Estimated Fair Value | 0 | 0
AFS, Less than 12 months, Unrealized Losses | 0 | 0
AFS, 12 months or more, Estimated Fair Value | 29,305 | 30,575
AFS, 12 months or more, Unrealized Losses | 490 | 579
AFS, Total Estimated Fair Value | 29,305 | 30,575
AFS, Total Unrealized Losses | $ 490 | $ 579

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