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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 |  |  |  |  |  |

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