Note 11 - Long-term Debt (Details) - USD ($)	Feb. 29, 2016	May. 31, 2015
Term Loan Facility [Member]
Term Loan Facility, net of $5,761 and $7,381 debt discounts, respectively	$ 637,675,000	$ 641,029,000
Less current portion, net of debt discounts	(1,700,000)
Revolving Credit Facility [Member]
Long-term Line of Credit	4,500,000
Notes, net of $2,819 and $3,291 debt discounts, respectively	$ 397,181,000	$ 396,709,000
Capital lease agreements		7,000
	$ 1,039,356,000	1,037,745,000
Less current portion, net of debt discounts	(8,878,000)	(4,469,000)
Long-term debt, net of current portion	$ 1,030,478,000	$ 1,033,276,000