Stock Issuance and Stock Repurchase Program (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended			9 Months Ended
	Jul. 31, 2014	Jan. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013	Nov. 07, 2013	Mar. 31, 2003
Share Repurchase Program
Number of shares purchased	5,000		490,000	10,000	495,000
Average price per share	$ 35.42		$ 30.87	$ 35.03	$ 30.90
Remaining authorization at July 31:	8,258,000		8,270,000	8,258,000	8,270,000
Stock Issuance and Stock Repurchase Program (Textual) [Abstract]
Stock Issued During Period, Shares, New Issues		7,200,000
Par value of common stock repurchased						$ 0.01	$ 0.01
Sale of Stock, Price Per Share						$ 32.00
Proceeds from Issuance of Common Stock				$ 220,365
Stock Repurchase Program, Number of Shares Authorized to be Repurchased							20,000,000