Derivative Financial Instruments - Fair Values of Assets and Liabilities Measured and Recognized at Fair Value (Detail) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Jan. 31, 2014	Oct. 31, 2013
Derivative liabilities:
Total fair value	$ 4,473	$ (905)
Other Receivables [Member]
Derivative assets:
Derivative assets	4,026	2,026
Accrued Liabilities [Member]
Derivative liabilities:
Derivative liabilities	(74)	(3,313)
Other Assets [Member]
Derivative assets:
Derivative assets	521	382
Level 1 [Member]
Derivative liabilities:
Total fair value
Level 1 [Member] | Other Receivables [Member]
Derivative assets:
Derivative assets
Level 1 [Member] | Accrued Liabilities [Member]
Derivative liabilities:
Derivative liabilities
Level 1 [Member] | Other Assets [Member]
Derivative assets:
Derivative assets
Level 2 [Member]
Derivative liabilities:
Total fair value	4,473	(905)
Level 2 [Member] | Other Receivables [Member]
Derivative assets:
Derivative assets	4,026	2,026
Level 2 [Member] | Accrued Liabilities [Member]
Derivative liabilities:
Derivative liabilities	(74)	(3,313)
Level 2 [Member] | Other Assets [Member]
Derivative assets:
Derivative assets	521	382
Level 3 [Member]
Derivative liabilities:
Total fair value
Level 3 [Member] | Other Receivables [Member]
Derivative assets:
Derivative assets
Level 3 [Member] | Accrued Liabilities [Member]
Derivative liabilities:
Derivative liabilities
Level 3 [Member] | Other Assets [Member]
Derivative assets:
Derivative assets