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Business Combinations (Assets Acquired and Liabilities Assumed) (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] |  |  |
Net working capital | $ (110) |  |
Property, plant and equipment | 68 |  |
Deferred taxes | (5,024) |  |
Goodwill | 12,601 |  |
Net assets acquired | 28,335 |  |
Purchased technology [Member] | DataRPM Corporation [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Finite-lived intangible assets | $ 19,900 |  |
Finite-lived intangible assets, useful life | 5 years |  |
Trade name [Member] | DataRPM Corporation [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Finite-lived intangible assets | $ 800 |  |
Finite-lived intangible assets, useful life | 5 years |  |
Customer relationships [Member] | DataRPM Corporation [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Finite-lived intangible assets | $ 100 |  |
Finite-lived intangible assets, useful life | 5 years |  |

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