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General (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended
	Jan. 31, 2013	Jan. 31, 2013	Oct. 31, 2012	Jan. 31, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Insurance proceeds	$ 19,100	$ 14,084	$ 5,000	$ 0

The gross income statement effect of insurance proceeds for each material event or transaction (that would not reasonably be expected to recur in the foreseeable future) that possesses a high degree of abnormality and are clearly unrelated to, or incidentally related to, the ordinary and typical activities of the entity.

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