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Equity (Summary of Stock Options Outstanding) (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] |  |
Options Outstanding, Number Outstanding | 1,961,532 | 2,551,743
Options Outstanding, Weighted-Average Remaining Contractual Life in Years | 6 years 3 months 21 days |
Options Outstanding, Weighted-Average Exercise Price | $ 31.16 | $ 30.82
Options Exercisable, Number Exercisable | 1,585,035 |
Options Exercisable, Weighted-Average Exercise Price | $ 33.73 |
Options Outstanding, Aggregate intrinsic value | $ 563 |
Options Exercisable, Aggregate intrinsic value | $ 405 |
$2.74 - $19.59 [Member] |  |
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] |  |
Range of Exercise Prices (Lower) | $ 2.74 |
Range of Exercise Prices (Upper) | $ 19.59 |
Options Outstanding, Number Outstanding | 33,828 |
Options Outstanding, Weighted-Average Remaining Contractual Life in Years | 8 years 1 month 13 days |
Options Outstanding, Weighted-Average Exercise Price | $ 18.20 |
Options Exercisable, Number Exercisable | 33,828 |
Options Exercisable, Weighted-Average Exercise Price | $ 18.20 |
$19.66 - $19.66 [Member] |  |
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] |  |
Range of Exercise Prices (Lower) | 19.66 |
Range of Exercise Prices (Upper) | $ 19.66 |
Options Outstanding, Number Outstanding | 828,891 |
Options Outstanding, Weighted-Average Remaining Contractual Life in Years | 6 years 11 months 23 days |
Options Outstanding, Weighted-Average Exercise Price | $ 19.66 |
Options Exercisable, Number Exercisable | 566,036 |
Options Exercisable, Weighted-Average Exercise Price | $ 19.66 |
$19.96 - $23.41 [Member] |  |
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] |  |
Range of Exercise Prices (Lower) | 19.96 |
Range of Exercise Prices (Upper) | $ 23.41 |
Options Outstanding, Number Outstanding | 523,812 |
Options Outstanding, Weighted-Average Remaining Contractual Life in Years | 7 years 2 months 23 days |
Options Outstanding, Weighted-Average Exercise Price | $ 22.05 |
Options Exercisable, Number Exercisable | 415,233 |
Options Exercisable, Weighted-Average Exercise Price | $ 22.25 |
$24.66 - $120.51 [Member] |  |
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] |  |
Range of Exercise Prices (Lower) | 24.66 |
Range of Exercise Prices (Upper) | $ 120.51 |
Options Outstanding, Number Outstanding | 575,001 |
Options Outstanding, Weighted-Average Remaining Contractual Life in Years | 4 years 4 months 20 days |
Options Outstanding, Weighted-Average Exercise Price | $ 56.75 |
Options Exercisable, Number Exercisable | 569,938 |
Options Exercisable, Weighted-Average Exercise Price | $ 57.00 |

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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=116856206&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=116856206&loc=d3e5070-113901 + 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=116856206&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=116856206&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=116856206&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance 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)(i) -URI http://asc.fasb.org/extlink&oid=116856206&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=116856206&loc=d3e5070-113901 + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. + 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=116856206&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, 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=116856206&loc=d3e5070-113901 + Details
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