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Stock Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2020
Stock Based Compensation [Abstract] |
Schedule Of Share-based Compensation, Stock Options, Activity |
Employee Stock Purchase Plan |  |  |  |  |  |  |
| ESPP |  | Weighted Average |  | Aggregate
(Dollars in thousands except share and per share data) | Options |  | Price Per Share |  | Intrinsic Value
Balance Outstanding at December 31, 2018 | 18,378 |  | $ | 32.73 |  | $ | -
Granted | 19,644 |  |  | 36.21 |  |  |
Exercised | (2,270) |  |  | 32.75 |  |  |
Expired | (16,641) |  |  | 32.84 |  |  |
Balance Outstanding at December 31, 2019 | 19,111 |  | $ | 36.21 |  | $ | 47
Granted | 32,209 |  |  | 24.19 |  |  |
Exercised | (753) |  |  | 25.32 |  |  |
Expired | (20,882) |  |  | 35.15 |  |  |
Balance Outstanding at December 31, 2020 | 29,685 |  | $ | 24.19 |  | $ | 84
Shares available for future grants under the ESPP at December 31, 2020 | 181,954 |  |  |  |  |  |
‎ The following table summarizes the activity in the Stock Plan:
| ISO |  | Weighted Average |  | Aggregate
(Dollars in thousands except share and per share data) | Options |  | Price Per Share |  | Intrinsic Value
Balance Outstanding at December 31, 2018 | 104,011 |  | $ | 28.22 |  | $ | 341
Granted | — |  |  | — |  |  |
Exercised | (8,482) |  |  | 22.82 |  |  |
Forfeited | (2,550) |  |  | 34.10 |  |  |
Balance Outstanding at December 31, 2019 | 92,979 |  | $ | 28.55 |  | $ | 943
Granted | — |  |  | — |  |  |
Exercised | (625) |  |  | 27.62 |  |  |
Forfeited | — |  |  | — |  |  |
Balance Outstanding at December 31, 2020 | 92,354 |  | $ | 28.55 |  | $ | —
|  |  | Weighted Average |  |  |
| Restricted |  | Grant Date |  |  |
| Shares |  | Fair Value |  |  |
Nonvested as of December 31, 2019 | — |  | $ | — |  |  |
Granted | 14,921 |  |  | 31.02 |  |  |
Vested | (398) |  |  | 31.02 |  |  |
Forfeited | (990) |  |  | 31.02 |  |  |
Nonvested as of December 31, 2020 | 13,533 |  | $ | 31.02 |  |  |
Shares available for future grants under the Stock Plan at December 31, 2020 | 293,090 |  |  |  |  |  |
Share-based Compensation Arrangement By Share-based Payment Award, Options, Vested And Expected To Vest, Outstanding And Exercisable |
|  | Options |  |  |  |  |  |  |  | Weighted
|  | Outstanding |  |  | Exercise Price or |  | Weighted Average |  | Average Remaining
Stock Option Plan |  | and Exercisable |  |  | Price Range |  | Exercise Price |  | Life (years)
Employee Stock Purchase Plan |  | 29,685 |  | $ | 24.19 |  | $ | 24.19 |  | 0.5
Incentive Stock Options |  | 20,200 |  |  | 21.27 |  |  | 21.27 |  | 5.2
Incentive Stock Options |  | 10,850 |  |  | 22.05 |  |  | 22.05 |  | 4.2
Incentive Stock Options |  | 61,304 |  |  | 30.00-34.10 |  |  | 32.11 |  | 6.7
ISO Total/Average |  | 92,354 |  |  |  |  | $ | 28.55 |  | 6.2

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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of number, weighted-average exercise price or conversion ratio, aggregate intrinsic value, and weighted-average remaining contractual term for outstanding and exercisable options that are fully vested and expected to vest. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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