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Investments - Gross Unrealized Losses - Tabular Disclosure (Details) $ in Thousands | Mar. 31, 2024 USD ($) security | Dec. 31, 2023 USD ($) security
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Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, total | security | 181 | 634
Gross Unrealized Losses, Less than twelve months | $ (441) | $ (248)
Fair Value, Less than twelve months | 159,382 | 56,109
Gross Unrealized Losses, Twelve months or more | (18,576) | (24,205)
Fair Value, Twelve months or more | 254,031 | 666,699
Total, Gross Unrealized Losses | (19,017) | (24,453)
Total, Fair Value | $ 413,413 | $ 722,808
U.S. Government Agencies [Member] |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, total | security | 14 | 14
Gross Unrealized Losses, Less than twelve months | $ (62) | $ (97)
Fair Value, Less than twelve months | 25,523 | 46,823
Gross Unrealized Losses, Twelve months or more | (87) |
Fair Value, Twelve months or more | 27,913 | 3,929
Total, Gross Unrealized Losses | (149) | (97)
Total, Fair Value | $ 53,436 | $ 50,752
Mortgage-Backed Securities [Member] |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, total | security | 39 | 321
Fair Value, Less than twelve months |  | $ 20
Gross Unrealized Losses, Twelve months or more | $ (751) | (1,222)
Fair Value, Twelve months or more | 9,578 | 94,505
Total, Gross Unrealized Losses | (751) | (1,222)
Total, Fair Value | $ 9,578 | $ 94,525
States and Political Subdivisions [Member] |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, total | security | 48 | 201
Gross Unrealized Losses, Less than twelve months | $ (1) | $ (33)
Fair Value, Less than twelve months | 201 | 6,950
Gross Unrealized Losses, Twelve months or more | (6,465) | (6,390)
Fair Value, Twelve months or more | 35,646 | 125,283
Total, Gross Unrealized Losses | (6,466) | (6,423)
Total, Fair Value | $ 35,847 | $ 132,233
Corporate Bond [Member] |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, total | security | 51 | 51
Gross Unrealized Losses, Less than twelve months |  | $ (118)
Fair Value, Less than twelve months |  | 2,316
Gross Unrealized Losses, Twelve months or more | $ (10,644) | (13,115)
Fair Value, Twelve months or more | 54,659 | 49,724
Total, Gross Unrealized Losses | (10,644) | (13,233)
Total, Fair Value | $ 54,659 | $ 52,040
Collateralized Loan Obligations [Member] |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, total | security | 29 | 47
Gross Unrealized Losses, Less than twelve months | $ (378) |
Fair Value, Less than twelve months | 133,658 |
Gross Unrealized Losses, Twelve months or more | (629) | $ (3,478)
Fair Value, Twelve months or more | 126,235 | 393,258
Total, Gross Unrealized Losses | (1,007) | (3,478)
Total, Fair Value | $ 259,893 | $ 393,258

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