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INCOME TAX - Change in Valuation Allowance (Details) - USD ($) $ in Thousands | 12 Months Ended
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May 31, 2016 | May 31, 2015
Movement in Deferred Tax Valuation Allowance [Roll Forward] |  |
Valuation allowance, beginning of period | $ (3,823) | $ (7,199)
Valuation allowance, end of period | (15,119) | (3,823)
Utilization of foreign net operating loss carryforwards |  |
Movement in Deferred Tax Valuation Allowance [Roll Forward] |  |
Valuation allowance, change | (4,474) |
Allowance for domestic net unrealized capital loss |  |
Movement in Deferred Tax Valuation Allowance [Roll Forward] |  |
Valuation allowance, change | (1,526) |
Allowance for domestic net unrealized capital loss |  |
Movement in Deferred Tax Valuation Allowance [Roll Forward] |  |
Valuation allowance, change | 1,746 |
Other |  |
Movement in Deferred Tax Valuation Allowance [Roll Forward] |  |
Valuation allowance, change | 98 | (11)
Foreign Tax Authority | Allowance for foreign income tax credit carryforward |  |
Movement in Deferred Tax Valuation Allowance [Roll Forward] |  |
Valuation allowance, change | $ (7,140) |
Foreign Tax Authority | Utilization of foreign net operating loss carryforwards |  |
Movement in Deferred Tax Valuation Allowance [Roll Forward] |  |
Valuation allowance, change |  | $ 3,387

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- Definition Movement in Deferred Tax Valuation Allowance [Roll Forward] + References No definition available. + Details
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e32123-109318 + Details
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