CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Aug. 31, 2020	Aug. 31, 2019
CONSOLIDATED BALANCE SHEETS [Abstract]
Receivables, allowance for doubtful accounts	$ 147	$ 144
Prepaid expenses and other current assets, fair value of derivative instruments	0	2,736
Other non-current assets, fair value of derivative instruments	872	0
Other long-term liabilities, fair value of derivative instruments	4,685	2,910
Other long-term liabilities, post-employment plans	$ 6,155	$ 5,421
Common stock, par value per share	$ 0.0001	$ 0.0001
Common stock, shares authorized	45,000,000	45,000,000
Common stock, shares issued	31,417,576	31,461,359
Common stock, shares outstanding	30,670,712	30,537,027
Treasury stock, shares	746,864	924,332