Financial Instruments and Fair Value Measurements (Details Textual)	3 Months Ended	12 Months Ended
	Jan. 31, 2010 USD ($)	Oct. 31, 2011 USD ($) Investment	Oct. 31, 2010 USD ($)		Oct. 31, 2011 EUR (€)	Jul. 31, 2010 USD ($)	Oct. 31, 2011 Senior Notes [Member] USD ($)	Oct. 31, 2010 Senior Notes [Member] USD ($)
Debt Instrument [Line Items]
Estimated fair value long-term debt							$ 866,800,000	$ 601,600,000
Carrying amount of long-term debt		1,357,638,000	965,589,000				825,900,000	545,700,000
Financial Instruments and Fair Value Measurements (Textual) [Abstract]
Weighted average of Variable interest rate		0.27%	0.26%
Weighted average of fixed interest rate		92.00%	1.78%
Other comprehensive loss on interest rate derivatives		300,000	2,000,000
Amount of fixed to floating swap agreement	100,000,000
Fixed interest rate on fixed to floating swap agreement	6.75%
Cash benefit from termination of swap agreement before tax included long term debt						3,600,000
Cash benefit from termination of swap agreement after tax included long term debt						2,200,000
Notional amount of outstanding foreign currency forward contracts		160,600,000	252,900,000
Gain (loss) on foreign currency forward contracts related to statement of operations		1,600,000	800,000
Loss on foreign currency forward contracts related to other comprehensive income		700,000	2,300,000
Notional amount of energy hedges		2,700,000	2,400,000
Other Comprehensive Income Unrealized Gain Loss on Energy Hedges Arising During Period Net of Tax		100,000	300,000
Principal amount in swap agreement received		200,000,000			146,600,000
Rate of interest paid under swap agreement		6.25%
Current portion of long-term debt		12,500,000	12,523,000	[1]
Approximate reclassification of net gain from accumulated other comprehensive loss		100,000
Number of interest rate derivatives Related to floating to fixed swap agreements recorded as cash flow hedges		3
Cash benefit from swap agreement			25,700,000
Restructuring-related expenses on long lived assets		4,500,000
Rate of interest received under swap agreement		6.75%
Total notional amount of interest rate derivatives		76,600,000
Tax benefit from swap agreement			15,800,000
Net book value of long lived assets		5,400,000
Recognized amount of impairment related to net assets held for sale		$ 1,300,000

[1] The consolidated balance sheet as of October 31, 2010 and the consolidated statements of changes in shareholders' equity as of October 31, 2009 and 2010 have been restated to correct prior period errors. The corrections did not impact total assets, consolidated net income, or cash flows of the Company. Refer to Note 19 for additional discussion.