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Investments (Tables) | 9 Months Ended
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Sep. 30, 2023
Investments [Abstract] |
Unrealized Gain (Loss) On Investments |
(Dollars in thousands) |  |  |  |  | Gross |  | Gross |  |  |
|  | Amortized |  | unrealized |  | unrealized |  | Fair
September 30, 2023 |  | cost |  | gains |  | losses |  | Value
U.S. Treasury |  | $ | 83,672 |  | $ | — |  | $ | (12,531) |  | $ | 71,141
Municipal |  |  | 161,659 |  |  | — |  |  | (32,942) |  |  | 128,717
Corporate |  |  | 26,331 |  |  | — |  |  | (3,348) |  |  | 22,983
Agency mortgage & asset-backed |  |  | 147,099 |  |  | 81 |  |  | (12,810) |  |  | 134,370
Non-Agency mortgage & asset-backed |  |  | 106,767 |  |  | 7 |  |  | (5,709) |  |  | 101,065
Total |  | $ | 525,528 |  | $ | 88 |  | $ | (67,340) |  | $ | 458,276
(Dollars in thousands) |  |  |  |  | Gross |  | Gross |  |  |
|  | Amortized |  | unrealized |  | unrealized |  | Fair
December 31, 2022 |  | cost |  | gains |  | losses |  | value
U.S. Treasury |  | $ | 101,980 |  | $ | — |  | $ | (11,723) |  | $ | 90,257
Municipal |  |  | 186,007 |  |  | 14 |  |  | (30,566) |  |  | 155,455
Corporate |  |  | 26,316 |  |  | — |  |  | (2,077) |  |  | 24,239
Agency mortgage & asset-backed |  |  | 163,274 |  |  | 19 |  |  | (12,358) |  |  | 150,935
Non-Agency mortgage & asset-backed |  |  | 70,756 |  |  | 1 |  |  | (4,807) |  |  | 65,950
Total |  | $ | 548,333 |  | $ | 34 |  | $ | (61,531) |  | $ | 486,836
Amortized Cost And Fair Value Of Debt Securities, By Contractual Maturity |
(Dollars in thousands) |  | Amortized ‎cost |  | Fair ‎value
Due in one year or less |  | $ | — |  | $ | —
Due after one year through five years |  |  | 44,354 |  |  | 38,583
Due after five years through ten years |  |  | 117,050 |  |  | 97,821
Due after ten years |  |  | 110,258 |  |  | 86,437
|  |  | 271,662 |  |  | 222,841
Mortgage & asset-backed |  |  | 253,866 |  |  | 235,435
|  | $ | 525,528 |  | $ | 458,276
Composition Of Net Realized Securities Gains (Losses) |
|  | For the Three Months Ended |  | For the Nine Months Ended
|  | September 30, |  | September 30,
(Dollars in thousands) |  | 2023 |  | 2022 |  | 2023 |  | 2022
Proceeds |  | $ | — |  | $ | 1,000 |  | $ | 40,117 |  | $ | 1,082
Gross gains realized |  | $ | — |  | $ | — |  | $ | 12 |  | $ | —
Gross losses realized |  |  | — |  |  | (15) |  |  | (1,131) |  |  | (34)
Net (losses) gains realized |  | $ | — |  | $ | (15) |  | $ | (1,119) |  | $ | (34)
Tax benefit (provision) on net (losses) gains realized |  | $ | — |  | $ | 3 |  | $ | 235 |  | $ | 7
Schedule Of Unrealized Loss On Investments |
| September 30, 2023
| Less than 12 months |  | 12 months or more |  | Total
| Fair |  | Unrealized |  |  |  | Fair |  | Unrealized |  |  |  | Fair |  | Unrealized |  |
(Dollars in thousands) | Value |  | Losses |  | Count |  | Value |  | Losses |  | Count |  | Value |  | Losses |  | Count
U.S. Treasury | $ | — |  | $ | — |  | — |  | $ | 71,141 |  | $ | (12,531) |  | 28 |  | $ | 71,141 |  | $ | (12,531) |  | 28
Municipal |  | 810 |  |  | (193) |  | 2 |  |  | 127,907 |  |  | (32,749) |  | 166 |  |  | 128,717 |  |  | (32,942) |  | 168
Corporate |  | 1,483 |  |  | (167) |  | 5 |  |  | 21,500 |  |  | (3,181) |  | 46 |  |  | 22,983 |  |  | (3,348) |  | 51
Agency mortgage & asset-backed |  | 7,716 |  |  | (195) |  | 22 |  |  | 120,909 |  |  | (12,615) |  | 228 |  |  | 128,625 |  |  | (12,810) |  | 250
Non-Agency mortgage & asset-backed |  | 49,219 |  |  | (859) |  | 25 |  |  | 48,230 |  |  | (4,850) |  | 56 |  |  | 97,449 |  |  | (5,709) |  | 81
Total temporarily impaired | $ | 59,228 |  | $ | (1,414) |  | 54 |  | $ | 389,687 |  | $ | (65,926) |  | 524 |  | $ | 448,915 |  | $ | (67,340) |  | 578
| December 31, 2022
| Less than 12 months |  | 12 months or more |  | Total
| Fair |  | Unrealized |  |  |  | Fair |  | Unrealized |  |  |  | Fair |  | Unrealized |  |
(Dollars in thousands) | Value |  | Losses |  | Count |  | Value |  | Losses |  | Count |  | Value |  | Losses |  | Count
U.S. Treasury | $ | 17,598 |  | $ | (183) |  | 3 |  | $ | 72,659 |  | $ | (11,540) |  | 28 |  | $ | 90,257 |  | $ | (11,723) |  | 31
Municipal |  | 73,644 |  |  | (9,586) |  | 90 |  |  | 80,503 |  |  | (20,980) |  | 104 |  |  | 154,147 |  |  | (30,566) |  | 194
Corporate |  | 12,221 |  |  | (851) |  | 25 |  |  | 10,368 |  |  | (1,226) |  | 21 |  |  | 22,589 |  |  | (2,077) |  | 46
Agency mortgage & asset-backed |  | 55,393 |  |  | (2,747) |  | 139 |  |  | 88,953 |  |  | (9,611) |  | 113 |  |  | 144,346 |  |  | (12,358) |  | 252
Non-Agency mortgage & asset-backed |  | 49,301 |  |  | (3,092) |  | 52 |  |  | 14,207 |  |  | (1,715) |  | 16 |  |  | 63,508 |  |  | (4,807) |  | 68
Total temporarily impaired | $ | 208,157 |  | $ | (16,459) |  | 309 |  | $ | 266,690 |  | $ | (45,072) |  | 282 |  | $ | 474,847 |  | $ | (61,531) |  | 591

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