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Investments (Tables) | 9 Months Ended
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Sep. 30, 2021
Investments [Abstract] |
Unrealized Gain (Loss) On Investments |
(Dollars in thousands) |  |  |  |  | Gross |  | Gross |  |  |
|  | Amortized |  | unrealized |  | unrealized |  | Fair
September 30, 2021 |  | cost |  | gains |  | losses |  | value
U.S. Government and Agency |  | $ | 89,813 |  | $ | 126 |  | $ | (293) |  | $ | 89,646
Municipal |  |  | 226,582 |  |  | 7,184 |  |  | (1,490) |  |  | 232,276
Corporate |  |  | 24,786 |  |  | 311 |  |  | (141) |  |  | 24,956
Agency mortgage-backed |  |  | 126,238 |  |  | 1,217 |  |  | (1,338) |  |  | 126,117
Private-label mortgage-backed |  |  | 27,073 |  |  | 50 |  |  | (74) |  |  | 27,049
Asset-backed |  |  | 45,514 |  |  | 359 |  |  | (129) |  |  | 45,744
Total |  | $ | 540,006 |  | $ | 9,247 |  | $ | (3,465) |  | $ | 545,788
(Dollars in thousands) |  |  |  |  | Gross |  | Gross |  |  |
|  | Amortized |  | unrealized |  | unrealized |  | Fair
December 31, 2020 |  | cost |  | gains |  | losses |  | value
U.S. Government and Agency |  | $ | 12,594 |  | $ | 20 |  | $ | (40) |  | $ | 12,574
Municipal |  |  | 236,253 |  |  | 11,020 |  |  | (219) |  |  | 247,054
Corporate |  |  | 20,421 |  |  | 22 |  |  | (155) |  |  | 20,288
Agency mortgage-backed |  |  | 70,443 |  |  | 1,905 |  |  | (107) |  |  | 72,241
Private-label mortgage-backed |  |  | 8,412 |  |  | 56 |  |  | (15) |  |  | 8,453
Asset-backed |  |  | 36,246 |  |  | 249 |  |  | (165) |  |  | 36,330
Total |  | $ | 384,369 |  | $ | 13,272 |  | $ | (701) |  | $ | 396,940
Amortized Cost And Fair Value Of Debt Securities, By Contractual Maturity |
(Dollars in thousands) |  | Amortized ‎cost |  | Fair ‎value
Due in one year or less |  | $ | 2,613 |  | $ | 2,644
Due after one year through five years |  |  | 21,770 |  |  | 22,368
Due after five years through ten years |  |  | 268,783 |  |  | 274,542
Due after ten years |  |  | 48,015 |  |  | 47,324
|  |  | 341,181 |  |  | 346,878
Mortgage-backed and asset-backed |  |  | 198,825 |  |  | 198,910
|  | $ | 540,006 |  | $ | 545,788
Composition Of Net Realized Securities Gains (Losses) |
|  | For the Three Months Ended |  | For the Nine Months Ended
|  | September 30, |  | September 30,
(Dollars in thousands) |  | 2021 |  | 2020 |  | 2021 |  | 2020
Proceeds |  | $ | — |  | $ | 1,225 |  | $ | 16,060 |  | $ | 1,390
Gross gains realized |  |  | — |  |  | 7 |  |  | 169 |  |  | 7
Gross losses realized |  |  | — |  |  | (23) |  |  | (78) |  |  | (33)
Net gains (losses) realized |  | $ | — |  | $ | (16) |  | $ | 91 |  | $ | (26)
Tax (provision) benefit on net gains (losses) realized |  | $ | — |  | $ | 3 |  | $ | (19) |  | $ | 5
Schedule Of Unrealized Loss On Investments |
| September 30, 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. Government and Agency | $ | 59,916 |  | $ | (280) |  | 15 |  | $ | 3,946 |  | $ | (13) |  | 5 |  | $ | 63,862 |  | $ | (293) |  | 20
Municipal |  | 48,450 |  |  | (971) |  | 55 |  |  | 12,248 |  |  | (519) |  | 11 |  |  | 60,698 |  |  | (1,490) |  | 66
Corporate |  | 8,447 |  |  | (96) |  | 17 |  |  | 1,455 |  |  | (45) |  | 2 |  |  | 9,902 |  |  | (141) |  | 19
Agency mortgage-backed |  | 76,682 |  |  | (1,179) |  | 64 |  |  | 5,710 |  |  | (159) |  | 6 |  |  | 82,392 |  |  | (1,338) |  | 70
Private-label mortgage-backed |  | 12,920 |  |  | (74) |  | 9 |  |  | — |  |  | — |  | — |  |  | 12,920 |  |  | (74) |  | 9
Asset-backed |  | 1,952 |  |  | (90) |  | 14 |  |  | 3,074 |  |  | (39) |  | 6 |  |  | 5,026 |  |  | (129) |  | 20
Total temporarily impaired | $ | 208,367 |  | $ | (2,690) |  | 174 |  | $ | 26,433 |  | $ | (775) |  | 30 |  | $ | 234,800 |  | $ | (3,465) |  | 204
| December 31, 2020
| 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. Government and Agency | $ | 3,966 |  | $ | (21) |  | 5 |  | $ | 4,185 |  | $ | (19) |  | 11 |  | $ | 8,151 |  | $ | (40) |  | 16
Municipal |  | 27,022 |  |  | (219) |  | 28 |  |  | — |  |  | — |  | — |  |  | 27,022 |  |  | (219) |  | 28
Corporate |  | 7,576 |  |  | (37) |  | 13 |  |  | 3,040 |  |  | (118) |  | 4 |  |  | 10,616 |  |  | (155) |  | 17
Agency mortgage-backed |  | 18,390 |  |  | (101) |  | 17 |  |  | 3,355 |  |  | (6) |  | 5 |  |  | 21,745 |  |  | (107) |  | 22
Private-label mortgage-backed |  | 2,506 |  |  | (15) |  | 2 |  |  | — |  |  | — |  | — |  |  | 2,506 |  |  | (15) |  | 2
Asset-backed |  | 1,458 |  |  | (12) |  | 2 |  |  | 11,452 |  |  | (153) |  | 15 |  |  | 12,910 |  |  | (165) |  | 17
Total temporarily impaired | $ | 60,918 |  | $ | (405) |  | 67 |  | $ | 22,032 |  | $ | (296) |  | 35 |  | $ | 82,950 |  | $ | (701) |  | 102
Other Than Temporary Impairment, Credit Losses Recognized In Earnings |
|  | Nine Months Ended
(Dollars in thousands) |  | September 30,
|  | 2021 |  | 2020
Balance of cumulative credit-related OTTI at January 1 |  | $ | 272 |  | $ | 272
Decreases for previously recognized credit losses on securities that paid off |  |  | (15) |  |  | —
Balance of credit-related OTTI at September 30 |  | $ | 257 |  | $ | 272

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