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Stock Based Compensation (Schedule of Outstanding Stock Options) (Details) - $ / shares | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Options Outstanding | 218,975 | 226,075 | 215,970
Average Exercise Price | $ 26.70 | $ 26.37 | $ 25.73
Remaining Life, Years | 6 years 9 months 18 days |  |
Options Exercisable | 180,975 | 182,575 |
Average Exercise Price | $ 27.68 | $ 26.50 |
Average Exercise Price 1 [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Options Outstanding | 11,125 |  |
Average Exercise Price | $ 17.93 |  |
Remaining Life, Years | 1 year |  |
Options Exercisable | 11,125 |  |
Average Exercise Price | $ 17.93 |  |
Average Exercise Price 2 [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Options Outstanding | 8,250 |  |
Average Exercise Price | $ 19.39 |  |
Remaining Life, Years | 1 year 10 months 24 days |  |
Options Exercisable | 8,250 |  |
Average Exercise Price | $ 19.39 |  |
Average Exercise Price 3 [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Options Outstanding | 9,375 |  |
Average Exercise Price | $ 19.03 |  |
Remaining Life, Years | 2 years 10 months 24 days |  |
Options Exercisable | 9,375 |  |
Average Exercise Price | $ 19.03 |  |
Average Exercise Price 4 [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Options Outstanding | 12,125 |  |
Average Exercise Price | $ 22.37 |  |
Remaining Life, Years | 4 years |  |
Options Exercisable | 12,125 |  |
Average Exercise Price | $ 22.37 |  |
Average Exercise Price 5 [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Options Outstanding | 25,250 |  |
Average Exercise Price | $ 32.81 |  |
Remaining Life, Years | 5 years |  |
Options Exercisable | 25,250 |  |
Average Exercise Price | $ 32.81 |  |
Average Exercise Price 6 [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Options Outstanding | 22,100 |  |
Average Exercise Price | $ 32.34 |  |
Remaining Life, Years | 6 years |  |
Options Exercisable | 22,100 |  |
Average Exercise Price | $ 32.34 |  |
Average Exercise Price 7 [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Options Outstanding | 22,500 |  |
Average Exercise Price | $ 36.02 |  |
Remaining Life, Years | 7 years |  |
Options Exercisable | 22,500 |  |
Average Exercise Price | $ 36.02 |  |
Average Exercise Price 8 [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Options Outstanding | 30,750 |  |
Average Exercise Price | $ 26.93 |  |
Remaining Life, Years | 8 years |  |
Options Exercisable | 30,750 |  |
Average Exercise Price | $ 26.93 |  |
Average Exercise Price 9 [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Options Outstanding | 1,000 |  |
Average Exercise Price | $ 26.35 |  |
Remaining Life, Years | 8 years 3 months 18 days |  |
Options Exercisable | 1,000 |  |
Average Exercise Price | $ 26.35 |  |
Average Exercise Price 10 [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Options Outstanding | 1,000 |  |
Average Exercise Price | $ 25.38 |  |
Remaining Life, Years | 8 years 6 months |  |
Options Exercisable | 1,000 |  |
Average Exercise Price | $ 25.38 |  |
Average Exercise Price 11 [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Options Outstanding | 37,500 |  |
Average Exercise Price | $ 25.80 |  |
Remaining Life, Years | 9 years |  |
Options Exercisable | 37,500 |  |
Average Exercise Price | $ 25.80 |  |
Average Exercise Price 12 [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Options Outstanding | 38,000 |  |
Average Exercise Price | $ 33.53 |  |
Remaining Life, Years | 10 years |  |

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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