Note 10 - Long-Term Debt (Details) - USD ($)	Nov. 30, 2015	May. 31, 2015
Term Loan Facility [Member]
Term Loan Facility, net of $6,306 and $7,381 debt discounts, respectively	$ 638,788,000	$ 641,029,000
Less current portion, net of debt discounts	(1,700,000)
Notes, net of $2,979 and $3,291 debt discounts, respectively	397,021,000	396,709,000
Capital lease agreements	1,000	7,000
	1,035,810,000	1,037,745,000
Less current portion, net of debt discounts	(4,404,000)	(4,469,000)
Long-term debt, net of current portion	$ 1,031,406,000	$ 1,033,276,000