Employee Benefit Plans (Details) (USD $)	12 Months Ended	3 Months Ended		12 Months Ended
	May 31, 2014 Pension Plans	Aug. 31, 2014 United States Pension Plan	Aug. 31, 2014 United Kingdom Pension Plan	May 31, 2015 Subsequent Event
Employee Benefit Plans (Details) [Line Items]
Pension Contributions	$ 1,400,000	$ 0	$ 300,000
Defined benefit plan lump sum payments triggering partial settlement, amount				$ 5.2