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Stock-Based Compensation (Details) - Stock Options [Member] - $ / shares | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Summary of options outstanding by exercise price range |  |
Options Outstanding, Number Outstanding at 12/31/17 | 99,800 |
Options Outstanding, Weighted Average Remaining Contractual Life (years) | 1 year 6 months 25 days | 1 year 6 months 25 days
Options Outstanding, Weighted Average Exercise Price | $ 34.55 |
Range One [Member] |  |
Summary of options outstanding by exercise price range |  |
Range of Exercise Price, Lower Range Limit | 0 |
Range of Exercise Price, Upper Range Limit | $ 15.00 |
Options Outstanding, Number Outstanding at 12/31/17 | 32,500 |
Options Outstanding, Weighted Average Remaining Contractual Life (years) | 2 years 5 months 16 days |
Options Outstanding, Weighted Average Exercise Price | $ 14.95 |
Range Two [Member] |  |
Summary of options outstanding by exercise price range |  |
Range of Exercise Price, Lower Range Limit | 15.01 |
Range of Exercise Price, Upper Range Limit | $ 42.50 |
Options Outstanding, Number Outstanding at 12/31/17 | 55,300 |
Options Outstanding, Weighted Average Remaining Contractual Life (years) | 1 year 4 months 28 days |
Options Outstanding, Weighted Average Exercise Price | $ 40.62 |
Range Three [Member] |  |
Summary of options outstanding by exercise price range |  |
Range of Exercise Price, Lower Range Limit | 42.51 |
Range of Exercise Price, Upper Range Limit | $ 62.10 |
Options Outstanding, Number Outstanding at 12/31/17 | 12,000 |
Options Outstanding, Weighted Average Remaining Contractual Life (years) | 1 year 7 months 6 days |
Options Outstanding, Weighted Average Exercise Price | $ 59.60 |

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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + 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 (g) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices. + 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)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + 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 (g) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices. + 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)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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