Income Taxes Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	May 31, 2016	May 31, 2015	Feb. 28, 2017
Deferred Tax Provision [Line Items]
Provision for deferred income taxes	$ 634	$ 841
Effective Income Tax Rate	17.00%
Scenario, Forecast [Member]
Deferred Tax Provision [Line Items]
Provision for deferred income taxes			$ 2,500