Stockholders' Equity (Schedule of Changes in Accumulated Other Comprehensive Income (Loss))(Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015	Oct. 31, 2015
Foreign Currency Translation Adjustment [Roll Forward]
Foreign Currency Translation Adjustment, Beginning Balance			$ (171,800)	$ (92,400)	$ (92,400)
Foreign Currency Translation Adjustment, Gross change in value for the period			(61,500)		(79,400)
Foreign Currency Translation Adjustment, Reclassification adjustments for loss realized in net income			0		0
Foreign Currency Translation Adjustment, Tax effect for the period			0		0
Foreign Currency Translation Adjustment, Ending Balance	$ (233,300)		(233,300)		(171,800)
Change in Value of Derivative Instruments [Roll Forward]
Change in Value of Derivative Instruments, Beginning Balance			0	(100)	(100)
Change in Value of Derivative Instruments, Gross change in value for the period			0		0
Change in Value of Derivative Instruments, Reclassification adjustments for loss realized in net income			0		100
Change in value of derivative instruments, Tax effect for the period	0	$ 0	0	(30)	0
Change in Value of Derivative Instruments, Ending Balance	0		0		0
Minimum Pension Liability [Roll Forward]
Minimum Pension Liability, Beginning Balance			(19,800)	(13,700)	(13,700)
Minimum Pension Liability, Gross change in value for the period			(100)		(10,000)
Minimum Pension Liability, Reclassification adjustments for loss realized in net income			0		0
Minimum Pension Liability, Tax effect for the period			0		3,900
Minimum Pension Liability, Ending Balance	(19,900)		(19,900)		(19,800)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Total, Beginning balance			(191,643)	$ (106,200)	(106,200)
Gross change in value for the period			(61,600)		(89,400)
Reclassification adjustments for loss realized in net income			0		100
Tax effect for the period			0		3,900
Total, Ending balance	$ (253,153)		$ (253,153)		$ (191,643)