CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	May 31, 2016	Aug. 31, 2015
CONSOLIDATED BALANCE SHEETS [Abstract]
Receivables, allowance for doubtful account	$ 0	$ 0
Other non-current assets, fair value of derivative instruments	3,889	4,129
Other accrued expenses, fair value of foreign currency forward contracts	192	66
Other long-term liabilities, fair value of derivative instruments	1,684	1,699
Other long-term liabilities, defined benefit plan	$ 3,791	$ 2,757
Common stock, par value per share	$ 0.0001	$ 0.0001
Common stock, shares authorized	45,000,000	45,000,000
Common stock, shares issued	31,214,715	30,977,764
Common stock, shares outstanding	30,394,175	30,184,584
Treasury stock, shares	820,540	793,180