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Shareholders' Equity (Stock Options Granted in 2015) (Narrative) (Details) - $ / shares | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 28, 2015 | Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Exercise price of options |  | $ 26.91
Share Option Plan (2013) [Member] | $26.91 [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Options granted | 89,907 |
Exercise price of options | $ 26.91 |
Expiration date | Jul. 28, 2023 |
Closing price to determine expiration date | $ 13.46 |

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- Definition Date the equity-based award expires, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Net number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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