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Investment (Income), Net (Tables) | 3 Months Ended
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Aug. 31, 2015
Investment (Income), Net | Investment (income), net, consists of the following components:
|  | Three Months Ended August 31, |
(In thousands) |  | 2015 |  |  | 2014 |
Interest (income) |  | $ | (1,364 | ) |  | $ | (1,404 | )
(Gain) on sale of marketable securities |  |  | (2,376 | ) |  |  | (2,116 | )
Dividend (income) |  |  | (328 | ) |  |  | (283 | )
Investment (income), net |  | $ | (4,068 | ) |  | $ | (3,803 | )

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- Definition Tabular disclosure of interest income and other income elements which are not separately disclosed on the income statement. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration