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Stock Based Compensation (Summary of Stock Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2020 | Dec. 31, 2019
Stock Based Compensation [Abstract] |  |
Options, beginning of year | 199,825 |
Options, Granted | 0 |
Options, Exercised | (2,005) |
Options, end of year | 197,820 | 199,825
Options, Exercisable, end of period | 171,070 |
Weighted Average Exercise Price Per Share, Outstanding, beginning of period | $ 24.78 |
Weighted Average Exercise Price Per Share, Granted |  |
Weighted Average Exercise Price Per Share, Exercised | 19.25 |
Weighted Average Exercise Price Per Share, Outstanding, end of period | 24.83 | $ 24.78
Weighted Average Exercise Price Per Share, Exercisable, end of period | $ 23.08 |
Weighted Average Remaining Contractual Term, Granted in Period | 5 years 9 months 18 days |
Weighted Average Remaining Contractual Term, Outstanding | 5 years 4 months 24 days | 5 years 10 months 24 days
Weighted Average Remaining Contractual Term, Exercisable at End of Period | 4 years 9 months 18 days |
Aggregate Intrinsic Value, Outstanding, beginning of period | $ 2,822 |
Aggregate Intrinsic Value, Granted in Period | 0 |
Aggregate Intrinsic Value, Outstanding, end of period | 728 | $ 2,822
Aggregate Intrinsic Value, Exercisable at end of period | $ 728 |

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- Definition Weighted average remaining contractual term for option awards granted, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + 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 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + 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 -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)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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