DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES Derivative Instruments and Hedging Activities (Details) (USD $)	3 Months Ended		9 Months Ended												9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended					3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	May 31, 2014	May 31, 2013	May 31, 2014	May 31, 2013	Aug. 31, 2013	Dec. 11, 2012	Feb. 21, 2012	Nov. 17, 2011	May 05, 2011	Nov. 20, 2008	May 31, 2014 RBTT [Member]	Aug. 31, 2013 RBTT [Member]	May 31, 2014 Scotiabank [Member]	Aug. 31, 2013 Scotiabank [Member]	May 31, 2014 Interest Rate Swap [Member]	Aug. 31, 2013 Interest Rate Swap [Member]	May 31, 2014 Cross Currency Interest Rate Contract [Member]	Aug. 31, 2013 Cross Currency Interest Rate Contract [Member]	Oct. 21, 2011 Colombia $6M Cross Currency Interest Rate Swap [Member]	May 22, 2014 Panama $20M Interest Rate Swap [Member]	May 22, 2014 Panama $4M Interest Rate Swap [Member]	Oct. 21, 2011 Colombia Cross currency interest rate swap [Member]	May 31, 2014 Derivative Swaps [Member]	May 31, 2013 Derivative Swaps [Member]	May 31, 2014 Derivative Swaps [Member]	May 31, 2013 Derivative Swaps [Member]	May 31, 2014 Forward Foreign Exchange Contracts [Member]	May 31, 2013 Forward Foreign Exchange Contracts [Member]	May 31, 2014 Forward Foreign Exchange Contracts [Member]	May 31, 2013 Forward Foreign Exchange Contracts [Member]	May 31, 2014 Fair Value, Inputs, Level 2 [Member] Fair Value, Measurements, Recurring [Member]	Aug. 31, 2013 Fair Value, Inputs, Level 2 [Member] Fair Value, Measurements, Recurring [Member]	May 31, 2014 Fair Value, Inputs, Level 2 [Member] Fair Value, Measurements, Recurring [Member] Derivative Swaps [Member]		Aug. 31, 2013 Fair Value, Inputs, Level 2 [Member] Fair Value, Measurements, Recurring [Member] Derivative Swaps [Member]		May 31, 2014 Fair Value, Inputs, Level 2 [Member] Fair Value, Measurements, Recurring [Member] Interest Rate Swap [Member]		Aug. 31, 2013 Fair Value, Inputs, Level 2 [Member] Fair Value, Measurements, Recurring [Member] Interest Rate Swap [Member]		May 31, 2014 Fair Value, Inputs, Level 2 [Member] Fair Value, Measurements, Recurring [Member] Cross Currency Interest Rate Contract [Member]		Aug. 31, 2013 Fair Value, Inputs, Level 2 [Member] Fair Value, Measurements, Recurring [Member] Cross Currency Interest Rate Contract [Member]
Derivative [Line Items]
Derivative, Notional Amount						$ 8,000,000	$ 8,000,000	$ 8,000,000	$ 8,000,000	$ 8,900,000									$ 6,000,000	$ 19,800,000	$ 3,970,000	$ 2,000,000
Document Period End Date			May 31, 2014
Derivative Asset, Current																																									(378,000)	[1],[2]	0	[1],[2]
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	12,862,000		12,862,000		12,871,000
Derivative Asset, Fair Value, Gross Asset																																									(729,000)	[1],[2]	(1,505,000)	[1],[2]
Derivative Liability, Fair Value, Gross Liability																																					(28,000)	[3]	(14,000)	[3]	(76,000)	[2]	0	[2]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net															19,000	10,000	(596,000)	(1,000,000)
Other Comprehensive Income (Loss), Tax	513,000	(338,000)	66,000	(367,000)											9,000	4,000	(435,000)	(497,000)
Derivative, Fixed Interest Rate						4.79%	6.02%	5.85%	6.09%	7.05%									5.45%	4.98%	4.98%	5.30%
interest expense (variable) on borrowings for derivatives	137,000	182,000	377,000	559,000
Gain (Loss) on Derivative Instruments, Net, Pretax																							405,000	482,000	1,169,000	1,341,000	(632,000)	(168,000)	(447,000)	(300,000)
interest expense (fixed) on borrowings of derivatives	542,000	664,000	1,546,000	1,900,000
Derivative Liability, Notional Amount	55,770,000		55,770,000		44,500,000						0	4,500,000	55,770,000	40,000,000
Derivative Assets (Liabilities), at Fair Value, Net																															$ 1,003,000	$ 1,491,000	$ 1,003,000	[4]	$ 1,491,000	[4]

[1] (2) The Company has recorded a deferred tax liability amount with an offset to other comprehensive income - tax of $(435,000) and $(497,000) as of May 31, 2014 and August 31, 2013, respectively, related to asset positions of cross-currency interest rate swaps.

[2] (1) The effective portion of the cross-currency interest rate swaps was recorded to Accumulated other comprehensive (income)/loss for $(596,000) and $(1.0) million net of tax as of May 31, 2014 and August 31, 2013, respectively.

[3] (3) The effective portion of the interest rate swaps was recorded to Accumulated other comprehensive loss for $19,000 and $10,000 net of tax as of May 31, 2014 and August 31, 2013, respectively. The Company has recorded a deferred tax asset amount with an offset to other comprehensive income - tax of $9,000 and $4,000 as of May 31, 2014 and August 31, 2013, respectively.

[4] Derivatives listed on the above table were designated as cash flow hedging instruments.