DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES Derivative Instruments and Hedging Activities (Details) (USD $)	6 Months Ended		12 Months Ended		3 Months Ended				6 Months Ended
	Feb. 28, 2015		Aug. 31, 2014		Feb. 28, 2015		Feb. 28, 2014		Feb. 28, 2014		Dec. 16, 2014	Dec. 10, 2014	Dec. 09, 2014	Oct. 23, 2014	Aug. 01, 2014	May 22, 2014	Dec. 11, 2012	Feb. 21, 2012	May 05, 2011	Oct. 21, 2011
Derivative [Line Items]
Derivative Liability, Notional Amount	$ 83,808,000		$ 60,200,000		$ 83,808,000
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	254,000		(94,000)
Other Comprehensive Income (Loss), Tax	86,000		(31,000)
Assets [Member] | Cross Currency Interest Rate Contract [Member]
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	(4,900,000)		(917,000)
deferred tax liability [Member] | Cross Currency Interest Rate Contract [Member]
Derivative [Line Items]
Other Comprehensive Income (Loss), Tax	(2,100,000)		(548,000)
Liability [Member] | Cross Currency Interest Rate Contract [Member]
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	172,000		0
Deferred Tax Asset [Domain] | Cross Currency Interest Rate Contract [Member]
Derivative [Line Items]
Other Comprehensive Income (Loss), Tax	74,000		0
El Salvador $4M Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount											4,000,000
Derivative, Fixed Interest Rate											4.78%
Colombia $15M Cross Currency Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount												15,000,000
Derivative, Fixed Interest Rate												8.25%
Panama $10M Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount													10,000,000
Derivative, Fixed Interest Rate													5.159%
Honduras $5M Cross Currency Interest Rate Swap [Member] [Member]
Derivative [Line Items]
Derivative, Notional Amount														5,000,000
Derivative, Fixed Interest Rate														11.60%
Panama $5M Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount															5,000,000
Derivative, Fixed Interest Rate															4.89%
Panama $20M Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount																19,800,000
Derivative, Fixed Interest Rate																4.98%
Panama $4M Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount																3,970,000
Derivative, Fixed Interest Rate																4.98%
Colombia $8M Cross currency interest rate swap [Member] [Member]
Derivative [Line Items]
Derivative, Notional Amount																	8,000,000	8,000,000	8,000,000
Derivative, Fixed Interest Rate																	4.79%	6.02%	6.09%
Colombia $6M Cross Currency Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount																				6,000,000
Derivative, Fixed Interest Rate																				5.45%
Colombia $2M Cross currency interest rate swap [Member]
Derivative [Line Items]
Derivative, Notional Amount																				2,000,000
Derivative, Fixed Interest Rate																				5.30%
Derivative Swaps [Member]
Derivative [Line Items]
interest expense (variable) on borrowings for derivatives	933,000	[1]			584,000	[1]	113,000	[1]	240,000	[1]
Gain (Loss) on Derivative Instruments, Net, Pretax	1,226,000	[2]			714,000	[2]	334,000	[2]	764,000	[2]
interest expense (fixed) on borrowings of derivatives	2,159,000				1,298,000		447,000		1,004,000
Forward Foreign Exchange Contracts [Member]
Derivative [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	6,134,000				3,521,000		62,000		185,000
Fair Value, Measurements, Recurring [Member]
Derivative [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	6,410,000		1,590,000		6,410,000
Fair Value, Measurements, Recurring [Member] | Forward Foreign Exchange Contracts [Member]
Derivative [Line Items]
Derivative Asset, Current	1,064,000		0		1,064,000
Derivative Liability, Current	0		(14,000)		0
Derivative Assets (Liabilities), at Fair Value, Net	1,064,000		(14,000)		1,064,000
Fair Value, Measurements, Recurring [Member] | Cross Currency Interest Rate Contract [Member]
Derivative [Line Items]
Derivative Asset, Current			495,000
Derivative Asset, Noncurrent	6,996,000		970,000		6,996,000
Derivative Liability, Noncurrent	(246,000)				(246,000)
Fair Value, Measurements, Recurring [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative Asset, Noncurrent			125,000
Derivative Liability, Noncurrent	(340,000)				(340,000)
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Derivative [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	6,410,000		1,590,000		6,410,000
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Forward Foreign Exchange Contracts [Member]
Derivative [Line Items]
Derivative Asset, Current	1,064,000		0		1,064,000
Derivative Liability, Current	0		(14,000)		0
Derivative Assets (Liabilities), at Fair Value, Net	1,064,000		(14,000)		1,064,000
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Cross Currency Interest Rate Contract [Member]
Derivative [Line Items]
Derivative Asset, Current	0	[3]	495,000	[3]	0	[3]
Derivative Asset, Noncurrent	6,996,000	[3]	970,000	[3]	6,996,000	[3]
Derivative Liability, Noncurrent	(246,000)	[4]			(246,000)	[4]
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative Asset, Noncurrent	0	[5]	125,000	[5]	0	[5]
Derivative Liability, Noncurrent	(340,000)	[5]	0	[5]	(340,000)	[5]
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Derivative Swaps [Member]
Derivative [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	6,410,000	[6]	1,590,000	[6]	6,410,000	[6]
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Cross Currency Interest Rate Contract [Member]
Derivative [Line Items]
Derivative Liability, Noncurrent			0	[4]
Scotiabank [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	64,058,000		60,200,000		64,058,000
Citibank [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	19,750,000		0		19,750,000
Bank of Nova Scotia [Member] | Forward Foreign Exchange Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 27,000,000				$ 27,000,000

[1] (1) This amount is representative of the interest expense recognized on the underlying hedged transactions.

[2] (2) This amount is representative of the interest expense recognized on the cross-currency interest rate swaps designated as cash flow hedging instruments.

[3] (1) The effective portion of the cross-currency interest rate swaps for this subsidiary was recorded to Accumulated other comprehensive (income)/loss for $(4.9) million and $(917,000) net of tax as of February 28, 2015 and August 31, 2014, respectively. The Company has recorded a deferred tax liability amount with an offset to other comprehensive income - tax of $(2.1) million and $(548,000) as of February 28, 2015 and August 31, 2014, respectively, related to asset positions of cross-currency interest rate swaps. However, the equity effect of this deferred tax liability is offset by the full valuation allowance provided for the net deferred tax asset recorded for this subsidiary.

[4] (3) The effective portion of the cross-currency interest rate swaps for this subsidiary was recorded to Accumulated other comprehensive (income)/loss for $172,000 and $0 net of tax as of February 28, 2015 and August 31, 2014, respectively. The Company has recorded a deferred tax asset amount with an offset to other comprehensive income - tax of $74,000 and $0 as of February 28, 2015 and August 31, 2014, respectively.

[5] (2) The effective portion of the interest rate swaps was recorded to Accumulated other comprehensive loss / (income) for $254,000 and $(94,000) net of tax as of February 28, 2015 and August 31, 2014, respectively. The Company has recorded a deferred tax asset / (liability) amount with an offset to other comprehensive income - tax of $86,000 and $(31,000) as of February 28, 2015 and August 31, 2014, respectively.

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