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Equity (Details 5) | 12 Months Ended
--- | ---
Dec. 31, 2018 $ / shares shares
Number outstanding | 776,171
Options outstanding weighted average remaining contractual life | 3 years 11 months 23 days
Options exercisable | 290,811
Exercise Price Range One [Member] |
Exercise price range, minimum | $ / shares | $ 23.61
Exercise price range, maximum | $ / shares | $ 29.36
Number outstanding | 209,920
Options outstanding weighted average remaining contractual life | 2 years 5 months 23 days
Options exercisable | 134,170
Exercise Price Range Two [Member] |
Exercise price range, minimum | $ / shares | $ 32.83
Exercise price range, maximum | $ / shares | $ 35.75
Number outstanding | 206,101
Options outstanding weighted average remaining contractual life | 2 years 10 months 6 days
Options exercisable | 123,781
Exercise Price Range Three Member] |
Exercise price range, minimum | $ / shares | $ 40.15
Exercise price range, maximum | $ / shares | $ 46.90
Number outstanding | 177,800
Options outstanding weighted average remaining contractual life | 4 years 11 months 16 days
Options exercisable | 32,860
Exercise Price Range Four Member] |
Exercise price range, minimum | $ / shares | $ 65.25
Number outstanding | 182,350
Options outstanding weighted average remaining contractual life | 6 years
Options exercisable |

X
- 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 exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. + 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)(iii) -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 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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