Senior Notes Payable (Details Textual 2) (USD $) In Thousands, unless otherwise specified	9 Months Ended				9 Months Ended		9 Months Ended		9 Months Ended		3 Months Ended				3 Months Ended		3 Months Ended
	Jul. 31, 2014 debtissuances	Jul. 31, 2013	Oct. 31, 2013	Jul. 31, 2014 Senior Notes Issued for Cash [Member]	Jul. 31, 2014 Four Point Nine Fine Percent Senior Notes Due two thousand and fourteen [Member]	Jan. 31, 2014 Four Point Nine Fine Percent Senior Notes Due two thousand and fourteen [Member]	Jul. 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]	Jul. 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]	Jul. 31, 2013 4.375% Senior Notes due 2023 [Member]	Jul. 31, 2014 4.375% Senior Notes due 2023 [Member]	May 13, 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	8
Issued Senior Notes	$ 2,654,666		$ 2,321,442	$ 2,657,400									$ 300,000	$ 100,000
Proceeds from Issuance of Senior Long-term Debt	600,000	400,383					350,000		250,000
Debt Instrument, Interest Rate, Stated Percentage						4.95%		4.00%		5.625%	5.95%			4.375%		4.375%		6.875%
percentage above par, senior debt issued														103.00%
Proceeds from Debt, Net of Issuance Costs							596,200					102,300			298,100
Repayments of Senior Debt	$ 267,960	$ 59,068			$ 268,000						$ 104,800						$ 59,100