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Investments (Tables) | 12 Months Ended
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Dec. 31, 2022
Investments [Abstract] |
Unrealized Gain (Loss) On Investments |
(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
(Dollars in thousands) |  |  |  |  | Gross |  | Gross |  |  |
|  | Amortized |  | unrealized |  | unrealized |  | Fair
December 31, 2021 |  | cost |  | gains |  | losses |  | value
U.S. Treasury |  | $ | 84,896 |  | $ | 88 |  | $ | (698) |  | $ | 84,286
Municipal |  |  | 206,501 |  |  | 7,148 |  |  | (1,422) |  |  | 212,227
Corporate |  |  | 24,794 |  |  | 333 |  |  | (188) |  |  | 24,939
Agency mortgage & asset-backed |  |  | 178,614 |  |  | 1,157 |  |  | (2,086) |  |  | 177,685
Non-Agency mortgage & asset-backed |  |  | 30,912 |  |  | 34 |  |  | (272) |  |  | 30,674
Total |  | $ | 525,717 |  | $ | 8,760 |  | $ | (4,666) |  | $ | 529,811
Amortized Cost And Fair Value Of Debt Securities, By Contractual Maturity |
(Dollars in thousands) |  |  |  |  | Amortized ‎cost |  | Fair ‎value
Due in one year or less |  |  |  |  | $ | 12,815 |  | $ | 12,782
Due after one year through five years |  |  |  |  |  | 13,242 |  |  | 12,666
Due after five years through ten years |  |  |  |  |  | 151,852 |  |  | 131,416
Due after ten years |  |  |  |  |  | 136,394 |  |  | 113,087
|  |  |  |  |  | 314,303 |  |  | 269,951
Mortgage-backed and asset-backed securities |  |  |  |  |  | 234,030 |  |  | 216,885
Total |  |  |  |  | $ | 548,333 |  | $ | 486,836
Composition Of Net Realized Securities (Losses) Gains |
(Dollars in thousands) |  | 2022 |  | 2021
Proceeds |  | $ | 19,629 |  | $ | 36,666
Gross gains realized |  |  | 61 |  |  | 626
Gross losses realized |  |  | (152) |  |  | (499)
Net (losses)/gains realized |  | $ | (91) |  | $ | 127
Tax provision on net (losses)/gains realized |  | $ | 19 |  | $ | (27)
Schedule Of Unrealized Loss On Investments |
| 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 |  |  | (20,981) |  | 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
| December 31, 2021
| 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 | $ | 76,383 |  | $ | (698) |  | 21 |  | $ | — |  | $ | — |  | — |  | $ | 76,383 |  | $ | (698) |  | 21
Municipal |  | 38,997 |  |  | (910) |  | 44 |  |  | 15,404 |  |  | (512) |  | 16 |  |  | 54,401 |  |  | (1,422) |  | 60
Corporate |  | 8,954 |  |  | (132) |  | 17 |  |  | 1,694 |  |  | (56) |  | 3 |  |  | 10,648 |  |  | (188) |  | 20
Agency mortgage & asset-backed |  | 96,923 |  |  | (1,669) |  | 94 |  |  | 15,991 |  |  | (417) |  | 18 |  |  | 112,914 |  |  | (2,086) |  | 112
Non-Agency mortgage & asset-backed |  | 15,215 |  |  | (215) |  | 11 |  |  | 1,964 |  |  | (57) |  | 3 |  |  | 17,179 |  |  | (272) |  | 14
Total temporarily impaired | $ | 236,472 |  | $ | (3,624) |  | 187 |  | $ | 35,053 |  | $ | (1,042) |  | 40 |  | $ | 271,525 |  | $ | (4,666) |  | 227
Other Than Temporary Impairment, Credit Losses Recognized In Earnings |
(Dollars in thousands) |  | Twelve Months Ended
|  | 2022 |  | 2021
Balance of cumulative credit-related OTTI at January 1 |  | $ | 257 |  | $ | 257
Decreases for previously recognized credit losses on securities that paid off or sold |  |  | (257) |  |  | —
Balance of credit-related OTTI at December 31 |  | $ | — |  | $ | 257

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