Note 19 - Segment and Geographic Information (Details) - Net Export Sales to Unaffiliated Customers (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Aug. 19, 2011		May 31, 2012		May 31, 2013		May 31, 2011
Net sales to customers by geography are as follows:
Net Sales to Customers	$ 74,910		$ 261,814		$ 347,788		$ 333,091
United States [Member]
Net sales to customers by geography are as follows:
Net Sales to Customers	50,988		173,918		229,944		227,263
Europe [Member]
Net sales to customers by geography are as follows:
Net Sales to Customers	14,180	[1]	49,486	[1]	63,643	[1]	61,743	[1]
Canada [Member]
Net sales to customers by geography are as follows:
Net Sales to Customers	3,907		14,349		19,985		16,447
Other Geographic Area [Member]
Net sales to customers by geography are as follows:
Net Sales to Customers	$ 5,835		$ 24,061		$ 34,216		$ 27,638

[1] Net sales to any individual country within Europe were not material to the Company's consolidated net sales.