Stock Issuance and Stock Repurchase Program (Details) - $ / shares shares in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Stock Repurchase Program [Abstract]
Number of shares purchased	3,698	3	11,405	214
Average price per share	$ 26.33	$ 37.64	$ 28.72	$ 31.50
Remaining authorization at July 31:	18,085	19,986	18,085	19,986