Derivative Instruments and Fair Value Measurement of Assets and Liabilities Derivative Instruments in Statement of Financial Position, Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2013	Oct. 31, 2012
Prepaid And Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Aluminum derivatives	$ 38	$ 10
Foreign currency derivatives	11	6
Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Aluminum derivatives	79	170
Foreign currency derivatives	123	23
Other Non-Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Aluminum derivatives	$ 0	$ 4