Stock Issuance and Stock Repurchase Program (Details) - $ / shares shares in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015
Stock Repurchase Program [Abstract]
Number of shares purchased	2,938	10	7,707	211
Average price per share	$ 27.27	$ 37.83	$ 29.88	$ 31.40
Remaining authorization at April 30:	10,827	19,989	10,827	19,989