Senior Notes Payable (Details Textual 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended				3 Months Ended		3 Months Ended		3 Months Ended			3 Months Ended		3 Months Ended
	Jan. 31, 2014 debtissuances	Jan. 31, 2013	Oct. 31, 2013	Jan. 31, 2014 Senior Notes Issued for Cash [Member]	Jan. 31, 2014 Four percent Senior Notes due two thousand and eighteen [Member]	Nov. 12, 2013 Four percent Senior Notes due two thousand and eighteen [Member]	Jan. 31, 2014 five point six two five percent Senior notes due twenty twenty four [Member]	Nov. 13, 2013 five point six two five percent Senior notes due twenty twenty four [Member]	Oct. 31, 2013 Five Point Nine Five Percent Senior Notes Due Two Thousand and Thirteen [Member]	Apr. 30, 2013 4.375% Senior Notes due 2023 [Member]	Apr. 03, 2013 4.375% Senior Notes due 2023 [Member]	Jul. 31, 2013 four point three seven five percent Senior Notes due 2023 second tranche [Member]	Apr. 03, 2013 four point three seven five percent Senior Notes due 2023 second tranche [Member]	Jan. 31, 2013 Six Point Eight Seven Five Percent Senior Notes Due Two Thousand and Twelve [Member]	Oct. 31, 2012 Six Point Eight Seven Five Percent Senior Notes Due Two Thousand and Twelve [Member]
Senior Note Payable (Textual) [Abstract]
Number of issuances of senior debt	9
Issued Senior Notes	$ 2,921,851		$ 2,321,442	$ 2,925,000
Proceeds from Issuance of Senior Long-term Debt	600,000				350,000		250,000			300,000		100,000
Debt Instrument, Interest Rate, Stated Percentage						4.00%		5.625%	5.95%		4.375%		4.375%		6.875%
Proceeds from Debt, Net of Issuance Costs	596,220									298,100		102,300
Repayments of Senior Debt		$ 59,068							$ 104,800					$ 59,100
Par value of senior note issuance													103.00%