Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)	3 Months Ended				12 Months Ended
	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Estimates and Critical Accounting Policies [Abstract]
Goodwill impairment					$ 0	$ 0
Foreign Currency Translation [Abstract]
Net foreign exchange gain (loss)					1,600,000	3,500,000	$ 2,900,000
Property, Plant and Equipment [Abstract]
Interest capitalized included in construction in progress					$ 3,100,000	$ 6,200,000
Treasury Stock [Abstract]
Number of shares in treasury (in shares)	3,290,318				3,290,318	3,290,318
Number of shares purchased	368,000	0	0	100,000	0	467,539
Interest Rate Swap [Member]
Financial Instruments [Abstract]
Derivative liability, fair value					$ 0
Building [Member] | Minimum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, useful life, (years)					30 years
Building [Member] | Maximum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, useful life, (years)					40 years
Machinery and equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, useful life, (years)					3 years
Machinery and equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, useful life, (years)					15 years