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Investments (Unrealized Gain (Loss) On Investments) (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | $ 525,528 | $ 548,333
Gross unrealized gains | 88 | 34
Gross unrealized losses | (67,340) | (61,531)
Fair value | 458,276 | 486,836
U.S Treasury [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | 83,672 | 101,980
Gross unrealized losses | (12,531) | (11,723)
Fair value | 71,141 | 90,257
Municipal [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | 161,659 | 186,007
Gross unrealized gains |  | 14
Gross unrealized losses | (32,942) | (30,566)
Fair value | 128,717 | 155,455
Corporate [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | 26,331 | 26,316
Gross unrealized losses | (3,348) | (2,077)
Fair value | 22,983 | 24,239
Agency Mortgage-Backed & Asset-Backed [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | 147,099 | 163,274
Gross unrealized gains | 81 | 19
Gross unrealized losses | (12,810) | (12,358)
Fair value | 134,370 | 150,935
Non-Agency Mortgage & Asset-Backed [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | 106,767 | 70,756
Gross unrealized gains | 7 | 1
Gross unrealized losses | (5,709) | (4,807)
Fair value | $ 101,065 | $ 65,950

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