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Stock Based Compensation (Share-based Compensation Arrangement By Share-based Payment Award, Options, Vested And Expected To Vest, Outstanding And Exercisable) (Details) | 12 Months Ended
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Dec. 31, 2018 $ / shares shares
ESPP [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options Outstanding and Exercisable | shares | 18,378
Price Range, Upper Range Limit | $ 32.73
Weighted Average Exercise Price | $ 32.73
Weighted Average Remaining Life (years) | 6 months
ISOP [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options Outstanding and Exercisable | shares | 104,011
Weighted Average Exercise Price | $ 28.22
Weighted Average Remaining Life (years) | 7 years 9 months 18 days
ISOP [Member] | Exercise Price Or Price Range One [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options Outstanding and Exercisable | shares | 3,107
Price Range, Upper Range Limit | $ 16.11
Weighted Average Exercise Price | $ 16.11
Weighted Average Remaining Life (years) | 2 months 12 days
ISOP [Member] | Exercise Price Or Price Range Two [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options Outstanding and Exercisable | shares | 33,400
Price Range, Lower Range Limit | $ 21.27
Price Range, Upper Range Limit | 22.05
Weighted Average Exercise Price | $ 21.56
Weighted Average Remaining Life (years) | 6 years 9 months 18 days
ISOP [Member] | Exercise Price Or Price Range Three [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options Outstanding and Exercisable | shares | 67,504
Price Range, Lower Range Limit | $ 30.00
Price Range, Upper Range Limit | 34.10
Weighted Average Exercise Price | $ 32.07
Weighted Average Remaining Life (years) | 8 years 8 months 12 days

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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=109197908&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=109197908&loc=d3e5070-113901 + Details
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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 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 Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, 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 -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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