VAT TAX ISSUE IN BRAZIL (Details Textual) In Millions, unless otherwise specified	1 Months Ended										3 Months Ended			12 Months Ended		3 Months Ended				1 Months Ended				12 Months Ended
	Oct. 31, 2010 USD ($)	Oct. 31, 2010 BRL	May 31, 2010 USD ($)		May 31, 2010 BRL		Oct. 31, 2009 USD ($)		Oct. 31, 2009 BRL		Apr. 30, 2011 USD ($)	Apr. 30, 2011 BRL		Jan. 31, 2013 USD ($)	Jan. 31, 2013 BRL	Apr. 30, 2011 Defended Based On Lapse Of Statute Limitations [Member] USD ($)	Apr. 30, 2011 Defended Based On Lapse Of Statute Limitations [Member] BRL	Apr. 30, 2011 Defended Based On State Auditor Misunderstanding [Member] USD ($)	Apr. 30, 2011 Defended Based On State Auditor Misunderstanding [Member] BRL	May 31, 2010 Original Claim 2004-2006 [Member] USD ($)	May 31, 2010 Original Claim 2004-2006 [Member] BRL	Oct. 31, 2010 Claim 2007-2009 By State Of Bahia [Member] USD ($)	Oct. 31, 2010 Claim 2007-2009 By State Of Bahia [Member] BRL	Jan. 31, 2013 Maximum [Member]	Jan. 31, 2013 Minimum [Member]
Foreign Currency Exchange Rate Translation1														1.82	1.82
Value Added Tax Examination Claims Incurred In Period							$ 3.0	[1]	4.8	[1]
Value Added Tax Examination Penalties and Interest Expense							3.5	[1]	5.6	[1]
Value Added Tax Examination Income Tax Total							6.5	[1]	10.4	[1]
Value Added Tax Claim Paid Amount			1.9	[1]	3.5	[1]
Value Added Tax Credit Carryforward Amount														1.1	2.1
Other Tax Expense (Benefit)											1.6
Value Added Tax Fines and Penalties Defendable	0.5	0.9														0.6	1.0	0.2	0.3
Total Paid Or To Be Paid Into Government Under Amnesty Program											5.0	9.2								2.2	3.5
Value Added Tax Payable During Period	5.5	11.1																				3.2
Fines and penalties															8.0							2.4	4.9
Available For Credit	1.9	3.4									2.9	5.4	[2]
Value Added Tax Judicial deposit														6.2	12.3
Judicial Court Deposit Initial Estimated Time Period																								2 years	1 year 6 months
Value Added Tax Judicial Deposit To Be Paid By Pledging Asset														$ 1.6	3.1
Value Added Tax Loss Of Incentive Description														Desenvolve is an incentive remaining from Brazils hyperinflationary days about 10 years ago. It is based on the net ICMS (VAT) tax payable. (QT pays ICMS to suppliers on raw materials, bills and collects ICMS from customers, takes credit for ICMS paid to suppliers and remits the difference. The net amount payable is payable 30% immediately and 70% for up to five years. The desenvolve is an incentive to pay the 70% quickly, like a cash discount. If the full amount is paid immediately, there is an 80% discount of the 70% (or 56% of the total).	Desenvolve is an incentive remaining from Brazils hyperinflationary days about 10 years ago. It is based on the net ICMS (VAT) tax payable. (QT pays ICMS to suppliers on raw materials, bills and collects ICMS from customers, takes credit for ICMS paid to suppliers and remits the difference. The net amount payable is payable 30% immediately and 70% for up to five years. The desenvolve is an incentive to pay the 70% quickly, like a cash discount. If the full amount is paid immediately, there is an 80% discount of the 70% (or 56% of the total).

[1] At exchange rate prevailing in 2010 when recorded.

[2] The amount allowed as credit against future payments represents the VAT taxes actually previously paid to the neighboring state.