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Business Combinations (Narrative) (Details) - USD ($) $ in Thousands | Mar. 01, 2017 | May 31, 2017 | Nov. 30, 2016
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill |  | $ 290,698 | $ 278,067
DataRPM Corporation [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Percentage of voting interests acquired | 100.00% |  |
Total purchase consideration | $ 30,000 |  |
Goodwill | 12,601 |  |
Restricted Stock Units [Member] | DataRPM Corporation [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Consideration payable in form of restricted stock units | $ 1,700 |  |
Award vesting period | 2 years |  |

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