Discontinued Operations - Schedule of Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2017	Aug. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax benefit (expense)	$ (41,727)	$ (1,141)
Gain on sale of business	100,269	0
Net income from discontinued operations	56,103	1,883
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	10,773	27,481
(Loss) income before income taxes	(2,439)	3,024
Income tax benefit (expense)	902	(1,141)
Gain on sale of business	100,269	0
Income tax expense on gain	(42,629)	0
Net income from discontinued operations	$ 56,103	$ 1,883