Note 7 - Other Intangible Assets (Details) - Intangible Assets (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Nov. 30, 2013	May 31, 2013
Note 7 - Other Intangible Assets (Details) - Intangible Assets [Line Items]
Intangible assets subject to amortization - cost	$ 799,869	$ 798,458
Intangible assets subject to amortization - accumulated amortization	(116,596)	(90,005)
Intangible assets subject to amortization - net	683,273	708,453
Other intangible assets, net	806,019	804,608
Other intangible assets, net	(116,596)	(90,005)
Other intangible assets, net	689,423	714,603
In Process Research and Development [Member]
Note 7 - Other Intangible Assets (Details) - Intangible Assets [Line Items]
Intangible assets not subject to amortization - cost	6,150	6,150
Intangible assets not subject to amortization - net	6,150	6,150
Non-amortizable assets [Member]
Note 7 - Other Intangible Assets (Details) - Intangible Assets [Line Items]
Intangible assets not subject to amortization - cost	6,150	6,150
Intangible assets not subject to amortization - net	6,150	6,150
Customer Lists [Member]
Note 7 - Other Intangible Assets (Details) - Intangible Assets [Line Items]
Intangible assets subject to amortization - weighted average life	20 years
Intangible assets subject to amortization - cost	467,220	465,909
Intangible assets subject to amortization - accumulated amortization	(52,052)	(40,392)
Intangible assets subject to amortization - net	415,168	425,517
Other intangible assets, net	(52,052)	(40,392)
Existing technology and trade names [Member]
Note 7 - Other Intangible Assets (Details) - Intangible Assets [Line Items]
Intangible assets subject to amortization - weighted average life	11 years
Intangible assets subject to amortization - cost	291,250	291,250
Intangible assets subject to amortization - accumulated amortization	(58,050)	(44,526)
Intangible assets subject to amortization - net	233,200	246,724
Other intangible assets, net	(58,050)	(44,526)
Corporate trade name [Member]
Note 7 - Other Intangible Assets (Details) - Intangible Assets [Line Items]
Intangible assets subject to amortization - weighted average life	15 years
Intangible assets subject to amortization - cost	40,000	40,000
Intangible assets subject to amortization - accumulated amortization	(6,088)	(4,754)
Intangible assets subject to amortization - net	33,912	35,246
Other intangible assets, net	(6,088)	(4,754)
Below market leasehold interests [Member]
Note 7 - Other Intangible Assets (Details) - Intangible Assets [Line Items]
Intangible assets subject to amortization - weighted average life	8 years
Intangible assets subject to amortization - cost	1,200	1,200
Intangible assets subject to amortization - accumulated amortization	(377)	(313)
Intangible assets subject to amortization - net	823	887
Other intangible assets, net	(377)	(313)
Deferred licensing costs [Member]
Note 7 - Other Intangible Assets (Details) - Intangible Assets [Line Items]
Intangible assets subject to amortization - weighted average life	6 years
Intangible assets subject to amortization - cost	199	99
Intangible assets subject to amortization - accumulated amortization	(29)	(20)
Intangible assets subject to amortization - net	170	79
Other intangible assets, net	$ (29)	$ (20)