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Shareholders' Equity (Stock Options Granted in 2015 and 2016) (Narrative) (Details) - $ / shares		1 Months Ended	12 Months Ended
	Jun. 08, 2016	Jul. 28, 2015	Dec. 31, 2016	[1]	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price of options			$ 29.34		$ 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
Share Option Plan 2013 [Member] | 28.38 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted	93,660
Exercise price of options	$ 28.38
Expiration date	Jun. 08, 2024
Closing price to determine expiration date	$ 14.19
[1] In 2016 the Company granted in the aggregate, 116,455 options. Regarding the grant of 93,660 options, see Note 11E. Regarding the grant of 22,795 options, see Note 3B.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-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

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