Comprehensive Income (Loss) - Additional Information (Detail) $ in Thousands	12 Months Ended
May 31, 2017 USD ($)
Other Comprehensive Income (Loss) [Line Items]
Gains in accumulated other comprehensive income, estimate of time of transfer	12 months
Gains in accumulated other comprehensive income expected to be reclassified into net earnings	$ 6,166
Gains in accumulated other comprehensive income expected to be reclassified into net earnings, tax	$ 3,770

Estimated period for the anticipated transfer of gain (loss), net, from accumulated other comprehensive income into earnings, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

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