Loans Payable, Senior Notes and Mortgage Company Loan Facility Credit Facility (Details Textual 2) - USD ($)	3 Months Ended
	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2015	Aug. 01, 2013
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,471,902,000
Long-term Line of Credit		$ 1,118,471,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity				$ 1,035,000,000
Line of Credit Facility, term of contract		5 years
Line of Credit Facility, Expiration Date		Aug. 01, 2018
Maximum Permissible Leverage Ratio		175.00%
Minimum Net Worth Required for Compliance		$ 2,530,000,000
Existing Leverage Ratio		.7446
Tangible Net Worth		$ 4,120,000,000
Ability to repurchase common stock		1,900,000,000
Long-term Line of Credit		0	$ 350,000,000
Letters of Credit Outstanding, Amount		$ 108,300,000
Debt Instrument, Interest Rate at Period End		1.93%
Guarantor Subsidiaries [Member]
Line of Credit Facility [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent		100.00%
Subsequent Event [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Proceeds from Lines of Credit	$ 75,000,000