Note 12. Other Long Term Liabilities (Detail) - Other Long Term Liabilities (USD $) In Thousands, unless otherwise specified	May 31, 2012	May 31, 2011	May 31, 2010
Severance indemnity for employees	$ 1,118	$ 1,224
Interest rate swap liability	1,406
Unrecognized tax benefits	14,831	9,766	8,093
Deferred leasehold improvement incentive		1,873
	15,215	3,097
Less current portion		(1,096)
Other long term liabilities	15,215	2,001
Other Long Term Liabilities [Member]
Unrecognized tax benefits	$ 12,691