CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Aug. 31, 2016	Aug. 31, 2015
CONSOLIDATED BALANCE SHEETS [Abstract]
Receivables, allowance for doubtful account	$ 7	$ 0
Other non-current assets, fair value of derivative instruments	3,224	4,129
Other accrued expenses, fair value of foreign currency forward contracts	110	66
Other long-term liabilities, fair value of derivative instruments	1,514	1,699
Other long-term liabilities, defined benefit plan	$ 4,013	$ 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	31,237,658	30,977,764
Common stock, shares outstanding	30,401,307	30,184,584
Treasury stock, shares	836,351	793,180