CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		12 Months Ended
		Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2014
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net income		$ 88,723	$ 89,124	$ 92,886
Other Comprehensive Income, net of tax:
Foreign currency translation adjustments	[1]	(1,702)	(50,130)	(8,089)
Defined benefit pension plan:
Net gain (loss) arising during period		(182)	65	260
Amortization of prior service cost and actuarial gains included in net periodic pensions cost		(20)	(291)	5
Total defined benefit pension plan		(202)	(226)	265
Derivative instruments:
Unrealized gains/(losses) on change in derivative obligations	[2]	1,826	(2,598)
Unrealized gains/(losses) on change in fair value of interest rate swaps	[2]	(2,361)	828	101
Amounts reclassified from accumulated other comprehensive income (loss) to other income (expense), for settlement of derivatives	[2]		(100)	(88)
Total derivative instruments	[2]	(535)	(1,870)	13
Other comprehensive income (loss)		(2,439)	(52,226)	(7,811)
Comprehensive income		$ 86,284	$ 36,898	$ 85,075

[1] Translation adjustments arising in translating the financial statements of a foreign entity have no effect on the income taxes of that foreign entity. They may, however, affect: (a) the amount, measured in the parent entity's reporting currency, of withholding taxes assessed on dividends paid to the parent entity and (b) the amount of taxes assessed on the parent entity by the government of its country. The Company has determined that the reinvestment of earnings of its foreign subsidiaries are indefinite because of the long-term nature of the Company's foreign investment plans. Therefore, deferred taxes are not provided for on translation adjustments related to non-remitted earnings of the Company's foreign subsidiaries.

[2] See Note 12 - Derivative Instruments and Hedging Activities.