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Acquisitions (Narrative) (Details) $ in Thousands							12 Months Ended
	Jan. 31, 2017 USD ($)	Jun. 17, 2015 USD ($)	Jun. 16, 2015 USD ($)	Apr. 02, 2015 USD ($)	Feb. 09, 2015 USD ($)	Dec. 17, 2014 USD ($)	Dec. 31, 2016 item
Acquisition date							Dec. 17, 2014
Consideration paid in cash						$ 54,552
Number of businesses acquired | item							0
Vertex-Global Holding B.V. [Member]
Acquisition date							Jan. 31, 2017
Cimatron [Member]
Acquisition date							Feb. 09, 2015
Acquired ownership percentage					100.00%
Consideration paid in cash					$ 77,984
Easyway [Member]
Acquisition date							Apr. 02, 2015
Acquired ownership percentage				65.00%			65.00%
Consideration paid in cash				$ 11,265
STEAMtrax [Member]
Acquisition date							Jun. 16, 2015
Consideration paid in cash			$ 2,550
Noquo [Member]
Acquisition date							Jun. 17, 2015
Fair value of consideration paid		$ 651
Subsequent Event [Member] | Vertex-Global Holding B.V. [Member]
Acquired ownership percentage	100.00%
Consideration paid in cash	$ 34,342
Fair value of consideration paid	$ 37,562

X

- Definition

Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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